by Summer Armstrong, Madison Holeman, Darley Reid, and Kallie Scroggins
DEEP IN OHIO
BY SUMMER ARMSTRONG, MADISON HOLEMAN, DARLEY REID, AND KALLIE SCROGGINS
OHIOS GEOLOGIC PAST: Quaternary
2.6 million years ago, two-thirds of Ohio was covered by very thick ice during the glacial period. During this period, mammoths, mastodons, giant beavers, and ground sloths were very modern animals. People were very used to seeing them. Some rock types were glacial till, clay, sand, silt, sand, and gravel. Common economic products were clay and cement.
In southeastern ohio, a coastal- plain swamp laid during the permian time period. Ohio lay about 5 degrees north of the equator and the swamp was full of deltaic sand and mud. Small amounts of freshwater fossils such as snails, fishes, and clams. Land fossils that are thinly dispersed are plants, amphibians, and reptiles. Some economical products are crushed limestone and electrical power from coal.
ohios geological past: permian
OHIOS GEOLOGIC PAST: Ordivician
During the Ordovician time period, deep in eastern ohio, a warm and shallow sea covered the land. It laid at 20 degrees south of the equator and low muddy island emerged in the western part of ohio. Some life forms were bryozoans abundant, also brachiopods, trilobites, and cephalopods. limestone and shale are found in southwestern Ohio.
OHIOS GEOLOGIC PAST: CAMBRIAN
During the Cambrian period, marine seas slowly flooded the precambrian land surface. sand was deposited along with silted muds, and limy muds which covered ohio. Ohio laid 10 degrees south of the equator. at the end of the Cambrian period, limy sediments gathered in a shallow marine sea. trilobites became more diverse later in the period. today, we use sandstone, shale, and dolomite for oil and gas.