Based on what we know about sedimentary rocks (texture, composition, weathering) which of the following samples was deposited closest to it source area?

Volcanic arcs form on the _______________________.

Which type of cross bedding shows a change in energy as the sediment was deposited?

Radiometric dating of a sample shows it has undergone 1 half-lives of decay, what percentage of parent material is contained in the sample?

Which of the following is a primary depositional sedimentary feature?

The actual subduction of a tectonic plate takes place at what physiographic feature on the Earth’s surface?

Diagenesis is the chemical, physical and biological changes that occur in sediment _______.

An unconformity can represent ________________________________________________.

A series of rock units in a stratigraphic column go from marine at the bottom of the column to terrestrial at its top, this reflects a _______________________ of the sea.

(This question requires analysis skills–so the answer isn’t obvious in the text.)  All of the following were consequences of the failed Bay of Pigs invasion for the United States EXCEPT