Nice little film showing group of geologists exploring some underground caves.
United States of America.
"In Pennsylvania, an enormous system of caverns has recently been discovered, and State Geologists are busy surveying them."
M/S of a group of men climbing down the side of some rocks by means of ropes. Inside a cave they climb into a little boat to negotiate an underground river. The roof if the cave is pretty low - rather claustrophobic. "The dry caverns are veritable forests of Stalactites and Stalagmites -"
Low angle shot of the men clambering over rock face. C/U of two of the geologists looking at a group of stalactites. One of the men uses a saw to remove one of the stalactites. "That's a beauty" says one of the men. They admire it. A group of the geologists crouch around a group of stalagmites. One of the men uses little xylophone beaters to play a tune on the stalagmites - very cute.
The men walk through the caves holding flares - all sorts of weird and wonderful shaped stalagmites are illuminated by their flares.