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Geologists take a look at an outcrop of limestone and chert to learn more about how to find and drill in hard rock to find oil and gas reservoirs</div>
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Click <a href="http://explorermultimedia.org/geowalk/field_trip.mp4">HERE</a> to download&nbsp;</div>
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Geologists take a look at an outcrop of limestone and chert to learn more about how to find and drill in hard rock to find oil and gas reservoirs Click HERE to download&nbsp;

Northwest Arkansas Chert Outcrop

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