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What type of sediment is typically found in lake bottoms?

The image below shows a series of graded beds. How many graded beds are shown?

A clastic rock composed of sand-sized grains derived from the physical weathering of granite and containing a sizable proportion of feldspar is termed ________.

In the last few decades, global warming has been most strongly affecting climate and wildlife of ________ regions.

During an earthquake, if the hanging wall slides upward relative to the footwall, the fault is termed a ________ fault if the fault is steep (closer to vertical than horizontal). Refer to the figure below for an example of such a feature.

Vertical motion seismographs record earthquakes by producing a squiggly diagram called a ________.

Consult the figure below. Abundant swamps led to the formation of coal during the Late Paleozoic in which of the following places?

The thickness of Earth’s crust varies from ________.

The image below of Death Valley, CA, shows a road that curves around a(n) ________.

In an unweathered sample of rock, the ratio of an unstable isotope to its stable daughter isotope is 1:15. If no daughters were present at the time the rock cooled below closure temperature, and the half-life of the isotope is 50 million years, how old is the rock?