Geo Ecosystems, Soils

The knick zone, documented by Suzanne, is steadily moving up Boulder Creek. What does this represent?

An abrupt irregularity in slope, like a waterfall

When saprolite is found around Boulder Creek, Colorado, it represents which of the following?

The layer of loose material that covers bedrock and denotes when the bottom of the Critical Zone is entered

The Critical Zone encompasses everything between the top of undisturbed bedrock and which other component?

The top of vegetation

CZO scientists used a cosmogenic radionuclide called Beryllium 10 to show mostly constant erosion in Boulder Canyon. How much erosion has taken place according to this method?

Three-quarters of an inch every 1000 years

The Rocky Mountains were created when _________.

eastward tectonic movement compressed old crystalline rocks against younger sedimentary layers