April 23, 2017 field work igneous James Hutton plate tectonics sedimentary rock stratigraphy tectonics Types of Margins unconformity Geologic Contacts A geologic contact is where one rock type touches another. There are three types of geologic contact: 1. Depositional contacts are those w...
January 07, 2017 Abrasion discovery erosion field work geological structures geological time scale geology James Hutton rocks sedimentary rock sedimentary structure sediments stratigraphy stress structure unconformity Siccar Point - the world's most important geological site and the birthplace of modern geology Siccar Point is world-famous as the most important unconformity described by J ames Hutton (1726-1797) in support of his world-changin...