Which of the following is the best indication that limestone caves could be present at depth?
A)Springs
B)Cliffs and overhangs along rivers
C)Large quartz crystals laying on the surface
D)Gently sloping hills
E)Limestone pillars and sinkholes

Question

Quizplus · Accepted Answer

Limestone pillars and sinkholes are formed due to the dissolution of limestone by acidic groundwater, indicating the presence of limestone caves at depth. Springs could also indicate the presence of limestone caves, but it is not the best indication as springs could also form due to other geological factors. Cliffs and overhangs along rivers, large quartz crystals laying on the surface, and gently sloping hills are not related to the presence of limestone caves.

Which of the Following Is the Best Indication That Limestone