Geomorphic Processes – Weathering

Physical

Exfoliation

Large exfoliating layers could be seen all over the granodiorite domes within the pluton.

Creep

The trees seen above indicate creep processes with their pistol butt characteristics.

Chemical

It is hypothesized that chemical weathering is only present where there is soil and tree cover on the dome. Soil covered areas retain water and help drive redox reactions within the profile. Water as a physical weathering process could be creating weathering pits, which facilitates soil and tree growth. The biologic past is not known, resulting in a little known history of the chemical weathering on Stone Mountain. The modern chemical weathering is restricted to vegetated areas and soil pits.

Hydrolysis

Rills created from concentrated flows of water.

Potholes at Stone Mountain State Park

Grus Formation

Seen here is an accumulation of coarse grained sediment (Grus) within a pothole.

Oxidation

The oxidized areas can be seen by the discoloration on the dome. Typically the areas observed had a dark grey to black color.