What type of rock primarily composes Niagara Cave?

The primary composition of Niagara Cave is dolomitic limestone, which is a sedimentary rock. This type of rock forms from the accumulation of materials over time, and it is characterized by its high magnesium content alongside calcium carbonate. The presence of dolomitic limestone in Niagara Cave is significant because it contributes to the cave's unique geological features and formations that visitors admire.

Dolomitic limestone is known for its solubility in slightly acidic water, which leads to the formation of karst landscapes typical of cave systems. This process of dissolution results in the creation of caverns, stalactites, stalagmites, and other fascinating geological formations that characterize the cave experience. The composition not only affects the physical appearance of the cave but also plays a role in the cave's ecology and the types of flora and fauna that inhabit it.

Other rock types listed, such as granite and basalt, are igneous and typically do not dissolve to form caves, while shale is a sedimentary rock that is much less soluble.