What layers extended horizontally in both locations?
Basement Rocks, Potomac Formation, Magothy Formation, Matawan Formation, Monmouth Formation, and Columbia Formation
What layers were found only under Middletown?
Hornerstown Formation
What layers were found only under Felton?
Pamunkey Formation, Piney Point Formation, Chesapeake Formation
Why do you think some layers are found at one location but not another?
Many of these deposits could have been laid down by rivers, streams, or other bodies of water that once existed. Their extent is limited by the watershed and the depositional zone of each body of water.
Are the rock layers under Delaware horizontal or are they sloped? How do you know? If sloped, in what direction?
The rock layers under Delaware are sloped as evidenced by the DNREC cross section as well as the Geologic Cross Section. When the rock layers are lined up and a correlation is completed, it is evident that the rock layers in Delaware slope down towards the south.
Describe the rock layers beneath your school.
The surface rock layer beneath my school is a relatively narrow band of Columbia Formation. Below that is a wide band of Potomac Formation. Below that is a wide band of basement rocks.
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