15. What type of rocks are located here in the Dayton area? Approximately how old are they? How was

the Dayton area different back then relative to today?

Additional Hints:

• Throughout this course, I have frequently reminded you that there are three important minerals to

remember: Feldspar (particularly Orthoclase Feldspar), Quartz, and Calcite. What are the

chances that these minerals are the answers to Questions 4, 5, and 6?

Throughout this course, I have frequently reminded you that there are six broad categories of

igneous rock and that there are two important ones to remember: Granite and Basalt. What are

the chances that one of these is the answer to another question?

• Throughout this course, I have frequently reminded you that there are four broad categories of

sedimentary rocks to remember: Conglomerate, Sandstone, Shale, and Limestone. The first three

are differentiated by the size of their grains (Conglomerate has the largest grains and Shale has

the smallest), and Limestone is made of the calcite skeletons of tiny sea creatures. Conglomerate

tends to form in mountainous headwaters, Shale and Limestone tend to form in oceans or large

lakes, and sandstone tends to form between those locations. What are the chances that some of

these four rocks are the answers to a few more questions?