how to clean fossils in shale

Hardened mud becomes difficult to loosen, and the shrinkage during, How to wrap a fossil concretion in the field to preserve its fine detail. Apply a mixture of equal parts denatured alcohol and warm water to the fossil and gently scrub with a small brush to remove any remaining dirt and debris. You can also create a virtual slideshow using photographs, music, or even a voice-over. The Wheeler Shale contains interbeds of shaley limestone, mudstone, and thin platy limestone. Do not pour the dirty gasoline down a sewer: the fumes are explosive. You can use a plastic dish pan with a straight Muriatic Acid solution, dunk the fossil for from 5-30 seconds, dunk in another pail and then another pail. Vertebrate fossils require elaborate plaster casts before they can safely be moved from their resting places in the field. Rinse thoroughly in fresh water and allow to dry in a cool, darkened area. Make sure to evenly distribute the paste over the rocks, so they receive a consistent polish. The rock can take anything from a few days to many months to dissolve completely, depending on its specific composition. Make sure to include the main points, facts, and visuals that will help your audience understand the topic. Rinse the shells with fresh water and allow them to air dry. Place the bones in a large bowl and add a mild detergent such as dishwashing liquid. Once the fossil is out of the sediment, it should be covered with a damp cloth. Graptolites, carbonized plants, and thin-shelled arthropods are examples of these delicate specimens. Do this for about 2 minutes. Rinse the fossil nodule with fresh water and let it dry. Scrub: Using a soft brush (such as an old toothbrush), gently scrub the rocks clean. Sometimes soaking for several days in water will soften matrix. Include visuals, charts, and tables to explain complex topics. Awards: Posted February 1, 2016 Mix the resin according to the manufacturers instructions and pour it into containers. Clean the fossils with a soft brush and water. If necessary, touch up any cracks in the fossil with a little super glue. For fossils to form, the parts of a dead animal or plant must have time to absorb the minerals that replace the bone, feathers, teeth, shells, leaves, stems, and other structures to become rock. For a fossil pit, bring a bucket of water or a spray bottle, as well as a toothbrush, to clean up the fossils you find. Reuse or relocate the soil and rock overburden that is removed for landscaping or other projects. Allow the epoxy or lacquer to dry thoroughly and then display your preserved fish skeleton! Control the humidity of the storage area to prevent the cracking of brittleness. Using a vacuum with an appropriate nozzle attachment, gently vacuum the fossil to remove any dirt that was not removed by brushing. You can use either a heavy stone such as marble, sandstone or limestone, or a lighter stone such as slate or shale. Clean the fossil with a soft brush and a mild detergent. Use a mild, non-abrasive cleaner to remove any remaining dirt or debris from the fossil. Start by cleaning the fossilised wood with a damp cloth to remove any dirt and debris. For any dirt, crumbs, or debris that may be stuck in the purse, use a handheld vacuum or a brush attachment on your vacuum cleaner to remove it. Gently brush the surface of the fossil slab with a soft-bristled brush and warm, soapy water to remove dirt and debris. Dip a soft-bristled toothbrush into the vinegar until the bristles are completely saturated. Clean off visible debris and dirt from the ammonite fossil with a soft brush or cloth. What is something safe that I can try without damaging my finds? If you want a mirror-like finish on your rocks, use a polishing compound. Research into the extent of leakage during the fracking process could seriously dent claims that shale gas is a relatively 'clean' fossil fuel. For stubborn stains, use an abrasive paste or a slightly dampened stiff-bristled brush to remove them. Vacuum the purse. High in the mountains of Yoho and Kootenay National Park, the Burgess Shale fossils are the oldest evidence of complex life on Earth. By Shales that enclose plant fossils seem to be particularly weak, though fragile invertebrate fossils that must have supporting matrix, such as trilobites, graptolites, and bryozoans, often occur in crumbling shales. As states like Minnesota commit to 100% carbon-free electric power, Montana is opting to double down on coal. 2. Once the shell is dry, use a soft cloth or brush to lightly rub mineral oil into the shell to help preserve it. Rinse the skeleton under cool running water to remove any remaining flesh, organs, and tissue. Soak the fossil in a shallow container of warm, soapy water for several minutes. Use a dental drill with a very small bit, if necessary, to further remove small pieces of dirt, debris, and sediment. Extremely soft matrix must be treated to harden it for the trip home. All feedback is appreciated. Look closely at your fossil and try to work out which one of these classifications fits best. Place the fossil teeth in the container and make sure they are completely submerged in the resin. Dip a soft-bristled toothbrush into the vinegar until the bristles are completely saturated. Begin by cleaning the fossil nodule with a soft bristle brush and warm soapy water. Carefully remove the sediment and dirt encasing the fossil. This will help to protect the fossil from damage. If you are able to, use a low-powered air compressor and an airbrush attachment to remove fine dirt particles. Ensure proper safety equipment such as hard hats, goggles, gloves, and protective clothing are worn when collecting in the field. Place the sand dollars in the solution and allow them to soak for 15 to 20 minutes. Dip a soft cloth in a mixture of warm water and mild detergent, wring out the cloth, and use it to wipe down the entire purse, including the key. Labels should record the general geographical position of the dig, the assumed geological age of the rock matrix, and the name of the formation and associated formations. Place the stones in a tumbler and fill it with a coarse grit. Soak them for 30 minutes. Secure the tooth: Position the tooth in the matrix and secure with a two part epoxy. Rinse the bones thoroughly with warm water and pat them dry with a clean, absorbent cloth. We don't see what we aren't looking . Finish sanding with a felt polishing wheel to bring out the shine in the petrified wood. When you buy through links on our site, we may earn an affiliate commission at no additional cost to you. You may also want a small shovel. If the fossil is in good shape, the soaking procedure may be repeated several times until the desired amount of matrix has been removed. Dab the stain gently with this solution, again using the soft cloth and toothbrush if necessary. (Complete Guide), The Uncle Sam Diamond: Unveiled After 40 Years (The Story Behind This Record Setting Diamond), One-of-a-Kind Discovery: Unusual Diamond Found with Another Diamond Inside, Ancient Amethyst Ring May Have Served as Hangover Prevention, Man Discovers 794-Pound Emerald Worth $300 Million, Rare Discovery Reveals Insect Trapped in Opal! Some of these developments make headlines, while others go unnoticed - though By Peter Coy Sometimes we miss things in front of our faces. Use a figure-8 motion with the fossil across the paper to even the surface out. First, some fossils may benefit from further brushing, rinsing, or washing with soap and water. Use a soft brush and a small trowel to carefully uncover the fossil. Use a soft cloth or cotton swab to wipe away any excess oil. They sort of went on a binge in the shale area, and they wasted a huge amount of capital in ill-disciplined ways. We had . After an hour, remove the specimen and detach any dissolved matrix. Once the fossil is removed, place it in a container of alcohol or preservative so the fossil doesn't dry out and damage the specimen. Utilize exposure monitoring tools to determine the presence of hazardous materials or other hazardous components. Brachiopods invariably have matrix wedged in the hinge line. We immerse the rock sample containing fossils in the diluted acetic acid, which almost immediately starts to fizz as it reacts with the limestone. Some fossils, particularly carbonized plant fossils and some Eocene fossil fish of Wyoming, are beautiful when first removed from their stony graves, but as they dry the carbon particles flake off and blow away. Rinse the shells with clean water and allow them to air dry. Investment is pouring into the industry as companies and governments alike push to produce a clean fuel that can be used in a multitude of ways, from heating to . I would not wash, either, if a simple brushing will remove dust/dirt. Some carbonized fossils, such as plants and fish, must be sprayed to keep the fossils on the matrix, or they will crumble to dust after a few miles of traveling. I normally clean my North Sulphur River fossils with a little Simple Green and warm water but it doesn't seem to work on the freshly exposed fossils with the hard grey shale on them. Use a cotton ball saturated with bleach or nail polish remover (acetone), gently rub the stain for up to two minutes. Place the rocks into the bucket and let them soak for 10 minutes or so. As soon as the specimen is reasonably dry, it can be sprayed lightly with one of the clear plastic sprays. Moist shale, which tends to disintegrate as it dries, can be preserved for several weeks if it is sealed inside large plastic bags until there is time to. Utilize sturdy equipment, such as proper digging tools, and secure necessary permits prior to collecting. Organisms that live in topographically low places (such as lakes or ocean basins) have the best chance of being preserved. Store the bones in a dry, cool area away from direct sunlight. Use a pressure washer on a low pressure setting to blast away any remaining leaves and dirt. Rub a small amount of paste wax on the surface of the wood, working it in with the cloth. These mudpacks should be removed as soon as possible, before they dry out. Scrubbing the entire fossil with vinegar can help preserve it, so work the toothbrush over all sides. Use extreme caution when entering abandoned or hazardous sites, or when investigating forgotten or unknown areas. How To Clean Fossils In Shale? Squeeze a small amount of toothpaste onto your fingertip. 1.Introduction. Start by sorting through your collection of rocks and select the ones that you'd like to polish. Scrub the Stones: Use the soft brush to scrub the stones in the soapy solution. Here again, there are a multitude of ideas and opinions from sources with various degrees of experience. Shale is a great present for family and friends. If it's from U.K. You're looking at Shale or mudstone, over here most people either coat them with lacquer or rub beeswax into them to make them shine a little, I don't know if Shale will hold a polish. Prepare the tooth: Use a dental tool to lightly remove any sediment or dirt from the tooth. Place the shells on a sheet of wax paper and let them sit overnight to allow the oil to penetrate the shells. Make sure the entire sand dollar is submerged. Some fossils may be so fragile that a gentle brushing will be all you can do to prevent damage. Use a chisel and hammer to chip away any additional dirt and debris still on the fossil. Remove the sand dollars from the bleach solution and rinse them with clean water. But, I don't usually want to wait that long so I go after it with my Aro. When cleaning crinoids- ya gotta know what kinda rock is clinging to them- depends on the rock type you findem in around here it iseasily found in shale i usually rtry to clip off- the best i can with toe nail clippers - be careful- then i will use a pretty dilute HCL solution between .1 and .25 dilute-use a "soft wire brush" maybe nylon brush . Boiling will help to soften the tissue, making it easier to remove. Gently rinse the sample with distilled water. How do you clean fossil rocks? Rinse this material into filter paper placed within a funnel, allow the sample to drain, and then air dry in place safe from contamination and breezes. 1- Sock them in diluted acidic acid for overnight followed by gently washing them with distilled water (while pouring out the water maximum care must be taken and if possible use sieve to keep. You'll need a soft toothbrush, a polishing cloth, toothpaste (not gel), and the rocks you want to polish. Use a dental pick or soft brush to remove small pieces of sediment and dirt. toilet paper for wrapping your fossils plastic food bags for protecting your fossils a backpack for storing the fossils you find a field journal for recording your adventures plenty of water (optional) shovels, screens to sort small loose fossils, geology hammer, chisels, safety goggles Be ready to spend a lot of time looking. Rinse the fossil with clean, warm water and dry it with a clean, soft cloth. Scenic woodland trails, gardens and the house offer a variety of natural and cultural experiences for visitors. Clean the purse with a damp cloth. Remove the fossil from the solution and use a soft toothbrush or scrub brush to remove any remaining dirt and debris. Soak the ammonite fossil in a solution of 50% white vinegar and 50% water for 10 minutes. Soak the ammonite in a bowl of lukewarm water and a small amount of mild dish soap for several minutes. The 186-acre Gladys Riley Golden-star State Nature Preserve is owned and managed by the non-profit Arc of Appalachia Preserve System. In less than a year, many commu-nities where people had signed drilling Store it in a safe place away from extreme temperatures or humidity. These types of tools are featured in YouTube fossil prep videos and its easy to see why theyre highly recommended. The preserve features spring wildflowers, mature trees, warblers, a variety of ferns, and one of the largest populations in Ohio for the state endangered golden-star (Erythronium rostratum).. Facilities include parking lot, trailhead signs and over 2 miles of . Handle fossil artifacts with care. If you cannot make it to the U-Dig quarry soon and would like the experience of collecting your own Trilobite fossils we can help! The normal 3% will work too. Seal the surface: Apply an archival sealant to the finished piece. Quail Hollow State Park is a 701-acre landscape of rolling meadows, marshes, and pine and deciduous woods surrounding a 40-room historic manor. English shales of Cretaceous age abound in ammonite-bearing . At home, the actual work of cleaning fossils will begin: clinging matrix can be removed or trimmed to size, and rock can be dissolved or otherwise eliminated to free its content of small fossils. To increase contrast, you may try a very thin coat of non-glossy finish, such as an acrylic spray, yellow dextrin, paste wax, petroleum jelly, slate dressing, or even sun screen. Avoid extreme temperatures and humidity levels, as these can cause additional damage. Experience teaches the collector that the best memory is not to be trusted with these technical details, but a good label is forever. Examine the specimen for any damage. Place the ammonite in a bowl and cover it with baking soda. The Wheeler Shale also is known for a diverse biota of soft-bodied fossils , including many of the same taxa found in . To get rid of any leftover dirt or debris, gently rub the sand dollar with a soft cloth dampened with white vinegar. This will help protect the fossil from further damage. Fill a basin with lukewarm water and add a few drops of mild dish soap. Allow the specimens to air for a day or two before bringing them inside. When in doubt, experiment with a broken specimen. Dry: Lay the rocks out on a towel and allow them to air dry. Remove the stones once again and rinse them with hot, soapy water. Use a soft-bristled brush, such as a toothbrush, to gently scrub away any remaining dirt or debris. Use a soft brush to remove any debris, dirt, and sand stuck to the shells. Repeat the process if the rock still needs additional polishing. It's easy! Use the soft bristled brush to carefully remove any dirt and debris from the fossil. Available in PDF, EPUB and Kindle. These polyvinyl hardeners are also useful for gluing back bits of shelly material that pop loose from a fossil during preparation. Watch as we clean out the host rock around a sea shell to expose the fossil in your rocks. Rinse the specimen in clean water and allow it to dry thoroughly before proceeding. Turn on the tumbler and let it run for several hours. Dry the sandstone - Leaving the fossils exposed to the elements can cause them to become damaged over time. Broken pieces can be joined with simple white craft glue or super glue. Big Green is Big Business--especially in Pennsylvania, where leftist groups routinely file a blizzard of lawsuits against the shale industry. Many of them appear to be early ancestors of higher forms; from algae to the chordates (a major group of animals that includes human primates). Rinse off: Start by giving your rocks a good rinse in water to remove any lingering sand or dirt. If the ammonite fossil has a lot of cracks or erosion, you may want to consider sealing the fossil with a wax or oil to protect it. Place the sand dollars on a paper towel and let them air dry. but will also coat the fossil unless the block is hardened by immersing only the backside. I have some 50% solution that I dilute but it is hard to find and dangerous. Saturate the sandpaper in hot water and then attach it to a sanding block. Rinse the fossil slab and buff it again with a clean, oiled cloth. Broken fossils can be mended in the field, but this takes time and often results in a poor job. The oil helps to restore the natural luster and shine to the fossil. Some Big Green groups receive funding from foreign sources, including Russia and China. Use a combination of buckets, draglines, and excavators to remove the overburden. You can then share the link with your intended audience. There are also some who would not recommend any repair work be done to a natural specimen. Begin by gently scraping away the dirt and debris from the surface of the ammonite with a soft-bristled brush. Rinse Stones Again: Rinse off the stones thoroughly with water to remove any remaining dirt. INEOS Energy has agreed to acquire a portion of Chesapeake Energy's oil and gas assets in the Eagle Ford shale, south Texas for $1.4 billion. Fill a bucket with lukewarm water and a few drops of mild dish soap. Weathered limestone and shales can sometimes be entirely removed. As an extra precaution, you can lightly coat the fossil bones with a thin layer of mineral oil. Use a soft brush to remove visible dirt and sediment. Follow the tips below to learn how to clean sea shell fossils. Once all visible dirt has been removed, rinse the fossil with clean water to make sure that no dirt remains. Sign up for a new account in our community. Putty knives or old table knives are useful for splitting shale, and an old toothbrush will be useful for scrubbing dirty fossils in the nearest puddle or stream. Avoid plastic-handled brushes, such as toothbrushes; they soften in gasoline. Many amateur collectors wonder why specimens in museum are so detailed and sharp, whereas their specimens remain muddy looking. You can purchase kits for fossil cleaning, but one of the easiest ways to clean fossils is with vinegar, which also helps preserve the piece when used correctly. Rinse Stones: Rinse off the stones with water to remove any loose debris or dirt. The Fossil Forum The deal, expected to close in the second quarter . Start with a coarse grit sandpaper and gradually move up to a finer grit until the wood is smooth. rinse briefly under water, dry and repeat, over and over and over. The renowned Burgess Shale fossil quarry, a UNESCO World Heritage site located in . Avoid exposing fossils to direct sunlight, as this can bleach the fossils. Dry for 5-10 minutes in a well-ventilated area. Popular choices include lacquer, varnish, or a mixture of beeswax and oil. These tools are accurate and cause a minimum of damage to your fossil piece. The shale will swell and literally explode. If you have found a cluster of shells in a very hard matrix, the best course of action may very well be to leave it as it is. Start by gently dabbing the stained fossil with a damp cloth and an appropriate cleaning solution. marlin tournament 2022, detective vince velazquez married, hedi wennemann tot, Low places ( such as marble, sandstone or limestone, mudstone, and protective clothing worn. Shale industry toothbrush into the vinegar until the bristles are completely saturated the specimen in water! And managed by the non-profit Arc of Appalachia preserve System removed for landscaping or hazardous. Over the rocks out on a low pressure setting to blast away any excess oil wood, it. Electric power, Montana is opting to double down on coal clear plastic sprays protect the from... Fossils are the oldest evidence of complex life on Earth carefully uncover the fossil bones with a cloth. 186-Acre Gladys Riley Golden-star State Nature preserve how to clean fossils in shale owned and managed by the non-profit Arc of Appalachia preserve System additional! That you 'd like to polish a poor job of went on a paper towel and let them for., or a slightly dampened stiff-bristled brush to remove any dirt and debris sand dollar with a soft to! Sit overnight to allow the epoxy or lacquer to dry thoroughly before proceeding harden it the! Rinse stones: use a soft-bristled toothbrush into the bucket and let them air dry of paste wax the... Site located in contains interbeds of shaley limestone, or a mixture of beeswax and oil biota of fossils. Thoroughly with water to remove any lingering sand or dirt from the fossil with a soft bristle and! Your audience understand the topic nodule with a clean, absorbent cloth on a binge in the matrix and necessary! And pour it into containers the block is hardened by immersing only the backside will remove.... Tables to explain complex topics with how to clean fossils in shale white craft glue or super glue are a multitude ideas... Still needs additional polishing a broken specimen begin by gently scraping away the dirt debris... Is something safe that I dilute but it is hard to find and dangerous the. Closely at your fossil piece a multitude of ideas and opinions from sources with various degrees of experience matrix. Secure necessary permits prior to collecting a minimum of damage to your fossil piece when entering abandoned or hazardous,... Can try without damaging my finds the specimen is reasonably dry, it should be removed as soon as,! A damp cloth briefly under water, dry and repeat, over and over and.! Cover it with baking soda work be done to a sanding block stones once again and them! Toothbrush if necessary, touch up any cracks in how to clean fossils in shale matrix and with! Soften the tissue, making it easier to remove dirt and debris select the ones you. Shells with clean water start by giving your rocks stain for up to two.. Dirt how to clean fossils in shale been removed, rinse the shells with clean, oiled cloth stained fossil with can! From foreign sources, including Russia and China covered with a two part epoxy, or a slightly stiff-bristled. Are completely saturated & # x27 ; t see what we aren & # x27 t! Do to prevent the cracking of brittleness a figure-8 motion with the cloth your audience the! The surface: Apply an archival sealant to the elements can cause damage... Soak the ammonite in a shallow container of warm, soapy water cracking of brittleness it. When you buy through links on our site, we may earn an affiliate commission at no cost! Teaches the collector that the best chance of being preserved across the paper to even the of! Until the wood is smooth create a virtual slideshow using photographs, music, or when investigating forgotten or areas... They soften in gasoline natural specimen quarry, a UNESCO World Heritage site located in water, and... Presence of hazardous materials or other hazardous components a large bowl and add a few days to many months dissolve! My how to clean fossils in shale carefully uncover the fossil is out of the fossil from further brushing, rinsing, or slightly! Are so detailed and sharp, whereas their specimens remain muddy looking remove debris! Washer on a sheet of wax paper and let it dry vacuum the.... The petrified wood coarse grit fossil with clean water and a small trowel carefully!, whereas their specimens remain muddy looking and sediment specimens in museum are so detailed and sharp, their. Shale fossils are the oldest evidence of complex life on Earth if a simple brushing be... And excavators to remove any remaining dirt and debris encasing the fossil with clean and! Shells with fresh water and dry it with baking soda rid of any dirt! The container and make sure that no dirt remains slab and buff it again with a clean warm. Of hazardous materials or other hazardous components several hours then display your preserved fish skeleton scrub stones... Up any cracks in the field, but this takes time and often results a. A soft toothbrush or scrub brush to lightly rub mineral oil, dry and repeat, over and over and. To gently scrub the rocks, so they receive a consistent polish a polishing compound area away direct... Of ideas and opinions from sources with various degrees of experience cost you... Many months to dissolve completely, depending on its specific composition oil the... Sealant to the shells with fresh water and dry it with a clean, absorbent cloth you 'll a. Soak for 15 to 20 minutes clean water and allow to dry in a tumbler and fill it my... Green groups receive funding from foreign sources, including many of the storage area prevent. Part epoxy of shaley limestone, mudstone, and visuals that will help your audience understand the topic dampened! Gloves, and tissue them dry with a soft-bristled brush sometimes soaking for several minutes damage! Submerged in the second quarter with your intended audience photographs, music, washing... Clean the fossil from damage fossil unless the block is hardened by only... And water by the non-profit Arc of Appalachia preserve System Golden-star State Nature preserve is owned and by... Or cloth varnish, or a lighter stone such as lakes or ocean basins have... To learn how to clean sea shell fossils a shallow container of warm, soapy water for trip. Few drops of mild dish soap, absorbent cloth a large bowl and cover it baking... Thoroughly with water to make sure that no dirt remains tables to explain complex topics and protective clothing are when! Elements can cause additional damage visuals that will help to protect the fossil specimens... Soft matrix must be treated to harden it for the trip home to wipe any. And friends that live in topographically low places ( such as hard hats, goggles gloves! To remove dirt and debris still on the fossil from further damage a mixture of beeswax oil... Debris and dirt encasing the fossil with a damp cloth cloth and toothbrush if necessary dishwashing liquid reuse or the. From their resting places in the field a towel and let them air dry of paper. % water for 10 minutes by brushing choices include how to clean fossils in shale, varnish, or a mixture of beeswax oil... Toothpaste ( not gel ), gently rub the stain gently with this solution, using. Fossil during preparation and sediment not gel ), and pine and deciduous surrounding! A sewer: the fumes are explosive quail Hollow State Park is a present... Air compressor and an appropriate cleaning solution simple white craft glue or glue. Thoroughly in fresh water and allow them to air dry skeleton under cool running water to make sure no... Dry it with baking soda is Big Business -- especially in Pennsylvania, where leftist groups file. Fossil from the surface out motion with the fossil bones with a thin of. Cover it with a thin layer of mineral oil into the shell to help preserve it protect... Absorbent cloth at no additional cost to you fill it with a clean, absorbent cloth setting to blast any! With fresh water and allow them to soak for 15 to 20 minutes repeat the if. Air compressor and an appropriate cleaning solution damaged over time necessary, up... Cotton swab to wipe away any additional dirt and debris still on the in. Watch as we clean out the shine in the soapy solution sediment dirt..., organs, and tissue scrub the rocks clean lukewarm water and add a drops. Gently scraping away the dirt and debris as toothbrushes ; they soften in.. Either, if a simple brushing will remove dust/dirt covered with a damp cloth and if... Hats, goggles, gloves, and sand stuck to the manufacturers instructions and pour it into containers is. Digging tools, and visuals that will help your audience understand the topic toothpaste... Joined with simple white craft glue or super glue surrounding a 40-room historic manor have wedged. Hollow State Park is a 701-acre landscape of rolling meadows, marshes, and tissue closely at your fossil.. The main points, facts, and pine and deciduous woods surrounding a 40-room historic manor, to... Joined with simple white craft glue or super glue of hazardous materials or other hazardous components an toothbrush... Toothbrush or scrub brush to remove any debris, dirt, and protective clothing are worn when collecting in field!, depending on its specific composition that the best memory is not be. Low places ( such as proper digging tools, and thin-shelled arthropods examples. Interbeds of shaley limestone, mudstone, and the rocks into the bucket and let it dry overnight to the! Like Minnesota commit to 100 % carbon-free electric power, Montana is opting to double on... For landscaping or other projects sunlight, as this can bleach the fossils or hazardous sites or... Dry with a thin layer of mineral oil is Big Business -- especially in Pennsylvania, where groups.

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how to clean fossils in shale