![]() One of the most important things a geologist has to note is the attitude of the sediemntary rocks in the area. ![]() (405 freeway construction, Los Angeles, California)Īrmed with a topographic map, the geologist records observations about the rocks he sees, and he then plots, among other things, a variety of different symbols recording anything he sees, from the rock type to its structures. An outcrop is simply a rock column exposed at the surface, whether naturally (because of erosion or mountain building) or artificially (because for instance of a road cut, a tunnel, or an excavation).Ī natural outcrop, caused by river erosion Geologists record information from a series of different outcrops. Most of the time, data collection (stratigraphic, paleontological, structural, etc.) occurs in the field.
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