1. Produced by Donald R. Privett, Ph.D.- P.G. Environmental and Engineering Geologist Lower Catawba River Valley of Southern Chester and Lancaster Counties, S.C. - Geology - Archeology and History Part 1
5. PURPOSE OF THIS PRODUCTION: 1. Provide an introduction to the general geology and geomorphology of the lower Catawba River Valley. 2. Show the areas natural history. 3. Summarize the understanding of the area geologic and human history. 4. Introduce the recreational opportunities of the area.
6. The Catawba River heads in the Blue Ridge Mountains as brook cascading high off the eastern slope of Chestnut Ridge in the Swannanoa Mountains near Old Fort, North Carolina. Collecting tributaries and picking up power on steep slopes it tumbles over falls and rapids and onto a broad valley flowing east for 120 km. It then makes two angular turns to flow south into South Carolina and into the Atlantic Ocean.
7.
8.
9.
10. South Carolina consists of three distinct geologic regions, from northwest to southeast, they are 1. Blue Ridge 2. Piedmont and 3. Coastal Plain. Great Falls is located in the Piedmont more specifically in the Carolina terrane and at the boundary between the Carolina Slate belt and The Charlotte belt. The area is underlain by massive crystalline rocks, both metamorphic and igneous.
11. Among the igneous are granites, diorites, and diabase. The metamorphic rocks consist of gneiss, schists, phyllites, meta-sediments, and meta-volcanics. The Piedmont Province is the non-mountainous portion of the older Appalachians. Its surface is the result of eons of weathering.
29. After Heavy Rains, Water Overflows the Spillway Dam, Forming a Waterfall for a Short While. To Hear It From an Open Window Is a Delight.
30. Looking across lake toward the Great Falls of the Catawba. The spillway dam is located near the base of the falls, most of the falls is under water.
40. Pothole in Granite. Potholes form over thousands of years by the scouring action of pebbles and cobbles caught in a depression and swirled by water.