[GEOL 101] - Midterm Exam Guide - Comprehensive Notes for the exam (19 pages long!)
5 Oct 2016
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A. 1. a) be able to apply the concepts of relative age dating to stratigraphic rock columns. A. 1. b) know at least one way rocks are dated by geologists: but first, time: relative age dating. Average modern sed. rates for sands, shales and limestones, like those found in the grand canyon, are approx. Sediments accumulated in the area of the grand canyon for approx. 450 my (note the canyon itself is recent-only a few million years old). Sediments in the canyon are - 1. 5 km thick. Amount of time represented by an unconformity can range from days to billions of years (d. 1. b. 1) there are three types of unconformities: (d. 1. b. 1. a) disconformity: two types of sedimentary rocks. There are three types of unconformities: (d. 1. f. 1) disconformity (d. 1. f. 2) angular unconformity (d. 1. f. 3) nonconformity. Gaps in the rock record due to erosion taking place instead of deposition. Amount of time represented by an uniformity can range: relative age dating from days to billions of years.
