The 2.5 billion year old metamorphic rocks that make up the east face of the Tetons are marine in origin and include some volcanic deposits.

The "intermediate" rocks include those characterized by the general absence of both quartz and olivine.

The next oldest rocks are of Cretaceous age and include:

The rocks are stacked to resemble a natural stratum and include a water source to allow icicles to form in the winter.

These rocks also include the old Nun's Baths and a seawall of the old fort.

Limestone rocks include mainly organic remains and precipitated carbonate.

Other rocks in the area include sandstone and claystone, and sand and gravel.

Sedimentary rocks most likely to form cliffs include sandstone, limestone, chalk, and dolomite.

Subvolcanic rocks include diabase (also known as dolerite) and porphyry.

Crystalline rocks with obsidian's composition include granite and rhyolite.