This is right in my wheelhouse, John. Here are a few of the many rock images I have taken in my career as a geologist.
Watson Lake, AZ (Granite)
Alabama Hills in CA (Granite)
Antelope Canyon, AZ (Sandstone)
Zion National Park, UT (Sandstone)
I posted all of my decent take-of mages last week, so I am posting flight images this week.
Common Mergansers
Great Horned Owl
Nothern Cardinal
Snowy Egret