Pennsylvanian rocks have a characteristic cyclical deposition ...

[scienceeasy]

Pennsylvanian rocks have a characteristic cyclical deposition sequence of ____ and ____ sediments
  called ____.
  a. shale, carbonate, varves
  b. marine, nonmarine, varves
  c. carbonate, shale, cyclothems
  d. marine, nonmarine, cyclothems
  e. none of the above

Question 2

A cratonic sequence is recognized by a:
  a. transgressive phase followed by regressive phase.
  b. regressive phase followed by a transgressive phase.
  c. regressive phase only.
  d. transgressive phase only.
  e. lack of any sequence.

[okolip]

Answer to Question 1

D

Answer to Question 2

A

[scienceeasy]

Excellent

[momolu]

Gracias!