Does the change of environment from the base of the section up to the thick gray shale indicate an advance transgression) or retreat regression) of the sea?
A) transgression
B) regression

Question

Does the change of environment from the base of the section up to the thick gray shale indicate an advance transgression) or retreat regression) of the sea? 
A) transgression 
B) regression

Quizplus · Accepted Answer

The Answer of Does the change of environment from the base of the section up to the thick gray shale indicate an advance transgression) or retreat regression) of the sea? 
A) transgression 
B) regression

Does the Change of Environment from the Base of the Section