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Admin25.08.2021

7.1: Relative Dating

Assemblages of fossils contained in strata are unique to the time they lived and can be used to correlate rocks of the same age across a wide geographic distribution.
302
Admin24.07.2021

Lab

An unconformity represents a period during which deposition did not occur or erosion removed rock that had been deposited, so there are no rocks that represent events of Earth history during that span of time at that place.
7201
Admin04.07.2021

Lab

What map symbols belong in the circle that marks the bed in the center of the map? What do the cross-sections tell you about the fold? How would you describe the strata in block diagram 2? Cross-sections seeing beneath the map To take a real-world look at geologic structures and how they appear on geologic maps, we will use the geologic map of Washington State published by the Washington State Department of Natural Resources.
46010
Admin25.08.2021

7.1: Relative Dating

Note: It may difficult to recognize which label applies to which rock unit on the geologic map.
5505
Admin29.07.2021

7.1: Relative Dating

This unconformity was actually an ancient landscape surface on which sedimentary rock C was subsequently deposited perhaps by a marine transgression.
6506
Admin15.06.2021

Lab

As seen in the figure, the other layers on the walls of the Grand Canyon are numbered in reverse order with 15 being the oldest and 1 the youngest [].
7408
Admin19.07.2021

Lab

a computer with access to the Internet• Which bed in block diagram 5 is the oldest? The wavy rock is an old metamorphic gneiss, A and F are faults, B is an igneous granite, D is a basaltic dike, and C and E are sedimentary strata.
4906
Admin07.09.2021

Lab

Advance Preparation and Materials Needed• Note: Remember as mentioned earlier, it may difficult to recognize which label applies to which rock unit on the geologic map.
2402
Admin04.08.2021

Lab

The western half of the metamorphic core complex is the Okanogan side, the eastern half is the Kettle side.