________ is an erosional contact between tilted, older strata below and horizontal, younger strata above.

What type of fossilization is best at preserving delicate animal forms?

Which of the following is an alternative to hard stabilization?

You come upon an outcropping of sandstone while working in the field in Southern Utah. You notice cross-beds. Which of the following would you be able to determine about this deposit, just from looking at it?

Which of the following is an example of a proxy data source that can be used by paleoclimatologists?

Hurricanes are said to have a steep pressure gradient, and as you move toward the center of the storm, ________.

The time period of “ancient life” is the ________ era.

Which of the following is an example of a proxy data source that can be used by paleoclimatologists?

The best-known features on the surface of the Sun are dark blemishes called ________.

Which of the following is an alternative to hard stabilization?