Chemistry, 07.12.2019 03:31, 24jgrove

The fossil pictured above came from the st. clair site in pennsylvania. the fossils are formed in black slate of the pennsylvanian period, 300 million years ago. the fossils found at this site are comprised of ferns and trees. this fossil record for this time period in pennsylvania indicates that the environment was a
a) desert
b) deep ocean
c) shallow sea
d) thriving forest

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The fossil pictured above came from the st. clair site in pennsylvania. the fossils are formed in bl...