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?