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CAROLINA GEOLOGICAL SOCIETY FIELD TRIP GUIDEBOOK November 13 – 15, 1992 GEOLOGICAL INVESTIGATIONS OF THE CENTRAL SAVANNAH RIVER AREA, SOUTH CAROLINA AND GEORGIA edited by Wallace Fallaw Department of Geology, Furman University, Greenville, SC 29613 Van Price Environmental Monitoring section, Westinghouse Savannah River Co., Aiken SC 29808 Front cover: Topography of the Central Savannah River Valley and surrounding area looking up-river. Copies of this guidebook can be obtained from: South Carolina Geological Survey Harbison Forest Road Columbia, South Carolina 29210-4089 ii WE THANK THESE CORPORATE SPONSORS FOR THEIR SUPPORT OF THE 1992 CAROLINA GEOLOGICAL SOCIETY MEETING J.H. HUBER CORPORATION Langley, South Carolina KENNECOTT RIDGEWAY MINING COMPANY Ridgeway, South Carolina RMT, INC. Greenville, South Carolina SOUTHEASTERN CLAY COMPANY Aiken, South Carolina GERAGHTY AND MILLER INC. Aiken, South Carolina FOSTER DIXIANA CORP. Columbia, South Carolina EXPLORATION RESOURCES INC. Athens, Georgia The United States Department of Energy and the South Carolina Geological Survey provided partial support for this guidebook. However, the opinions and interpretations expressed within are not necessarily those of the Department of Energy or the South Carolina Geological Survey. iii CONTENTS Road Log and Outcrops in the vicinity of the Savannah River Site (W.C. Fallaw, Van Price and Walter J. Sex- ton) . .. .1 Observations on general allo-stratigraphy and tectonic framework of the southeastern Atlantic Coast Regional Cross Section (DNAG E-5 Corridor) Georgia and South Carolina as they relate to the Savan- nah River Site. (Donald Colquhoun). .. .11 Outline of stratigraphy at the Savannah River Site. (W. C. Fallaw and Van Price) . .17 Stratigraphic relationships in Eocene out crops along Upper Three Runs at the Savannah River Site. (W. C. Fal- law, David S. Snipes, J.S. Daggett, Lillian Furlow, April James, J.P. Moore, Sarah Price, Van Price). .. .41 An initial geochemical and isotopic study of granite from core C-10, Savannah River Site, S.C. (Stephen A. Kish) . .. .45 Petrology and reservoir characteristics of Middle and Late Eocene carbonate strata in downdip wells at the Savannah River Site, S.C. (Paul A. Thayer and Mary K. Harris) . .49 The McBean Formation and Orangeburg District bed – Cook Mountain and Gosport equivalents (Middle Eocene) in the Coastal Plain of South Carolina. (David T. Dockery III and Paul G. Nystrom, Jr.) . .. .57 Nannofossil biostratigraphy and sequence stratigraphy of Middle to Upper Eocene Strata in the Southwestern Savannah River Site and Adjacent Areas of Georgia. (Richard A. Laws, W. Burleigh Harris and Victor A. Zullo). .. .59 Some Characteristic fossil Dinoflagellate cysts of Eocene Strata, Savannah River Site, South Carolina. (Joyce Lucas–Clark) . .. .63 Middle and Late Wisconsinan radiocarbon dates of peat in Upper Three Runs and Tinker Creek Alluvial sedi- ments: Constraints on rates of incision and sedimentation. (Paul G. Nystrom, Jr.) . .67 Hydrostratigraphy of the Savannah River Site region, South Carolina and Georgia. (Rolf K. Aadland, Paul A. Thayer and Andrew D. Smits) . .. .71 Petrology and porosity-permeability characteristics of Tertiary aquifer sands, Savannah River Site Region, South Carolina. (Paul A. Thayer, Andrew D. Smits and Rolf K. Aadland). .77 Upper Claibornian coastal marine sands of eastern Georgia and the Savannah River. (Paul Huddlestun) . .83 Silver Bluff: A very celebrated place. (W. C. Fallaw, David S. Snipes and Van Price). .87 IV CAROLINA GEOLOGICAL SOCIETY Guidebook for 1992 Annual Meeting Pages 1-9 OUTCROPS IN THE VICINITY OF THE SAVANNAH RIVER SITE W. C. Fallaw Department of Geology Furman University Greenville, South Carolina 29613 Van Price Westinghouse Savannah River Company Aiken, South Carolina 29808 Walter J. Sexton Athena Technologies Columbia, South Carolina 29205 ROAD LOG 0.2 1.4 STOP 3, LOCALITY D; TOBACCO ROAD SAND AT VOGTLE PIT Saturday Turn around, proceed north on River Road Miles Cumulative 0.3 1.7 Turn left onto Ebenezer Church Road 0.0 Leave Radisson and go west on 9th Street 4.0 5.7 Turn left onto GA 23 0.6 0.6 Turn left onto Walton Way 4.1 9.8 Road to Griffins Landing on left 0.7 1.3 Turn right onto 5th Street 0.8 10.6 Girard, GA 0.4 1.7 Bear right onto US 1, 78, 278 (Gordon Highway) and proceed west 0.5 11.1 Turn left toward Allendale, SC, leaving GA 23, and then bear right toward US 301 on Stony Bluff 2.8 4.5 Turn left onto Old Savannah Road Road 0.8 5.3 Turn left at stop sign, remaining on Old Savannah 7.8 18.9 Turn left on unpaved road, remaining on Stony Road Bluff Road 2.0 7.3 Cross I 520 and continue south on GA 56 0.3 19.2 FRAGMENTS OF OLIGOCENE CHERT ON 2.3 9.6 Cross Tobacco Road ROAD 8.5 18.1 McBean sign 0.7 19.9 Turn right on unpaved road 1.3 19.4 McBean Creek 0.5 20.4 NORTHERN END OF LARGE CAROLINA 0.1 19.5 Turn left onto GA 56 spur toward Vogtle generat- BAY ON RIGHT ing plant 3.9 23.8 Turn left onto paved road 0.3 19.8 STOP 1, LOCALITY M: “MCBEAN” CAR- 4.1 27.9 Turn left onto US 301 BONATE (Figs. 1,2) 1.4 29.3 Savannah River Continue south on GA 56 spur toward Vogtle 2.8 32.1 Turn left toward Martin, SC generating plant 4.9 37.0 STOP 4, LOCALITY A; TOBACCO ROAD 5.1 24.9 Gut Creek SAND AND ALTAMAHA FORMATION 1.2 26.1 GA 56 spur ends; continue ahead on River Road Continue ahead 7.8 33.9 Turn left at entrance to Plant Vogtle 3.6 40.6 Martin, SC 1.3 35.2 Plant Vogtle visitor’s center 0.2 40.8 Turn left at stop sign onto SC 125 and cross STOP 2, LOCALITY B; EOCENE CARBON- Lower Three Runs ATES AT PLANT VOGTLE BLUFF 8.3 49.1 Enter Savannah River Site 0.0 Reset mileage, leave visitor’s center, return to 17.0 66.1 Bear left at stop sign and exit Savannah River River Road Site; proceed north through Jackson, SC on SC 1.2 1.2 At plant entrance, turn left and go south on River 125 toward Augusta, GA Road 14.4 80.5 Turn right into Augusta Sand and Gravel opera- 1 W.C. FALLAW, VAN PRICE, AND WALTER J. SEXTON 2 OUTCROPS IN THE VICINITY OF THE SAVANNAH RIVER SITE Figure 2. Generalized NW-SE cross-section, SRS and vicinity SRS and cross-section, NW-SE Generalized 2. Figure 3 W.C. FALLAW, VAN PRICE, AND WALTER J. SEXTON tion 0.4 30.1 Continue around Good Hope Farms Road loop OPTIONAL STOP 5, LOCALITY E; CRE- and return to SC 302 TACEOUS 1.6 31.7 Turn left onto SC 302 Return toward SC 125 4.6 36.3 Bear right at stop light onto Pine Log/Silver Bluff 0.2 80.7 Turn right onto SC 125 Road 1.2 81.9 Cross US 1 0.5 36.8 Turn left at stop light onto SC 118 (Hitchcock Parkway) 2.1 84.0 Turn right onto SC 230 0.8 37.6 Pull off on right 1.0 85.0 Turn left onto US 25 (Georgia Avenue) STOP 4, LOCALITY H; DRY BRANCH (?) 1.5 86.5 Savannah River SILICIFIED FACIES 0.2 86.7 Turn left onto Reynolds Continue ahead 0.4 87.1 Turn left to Radisson Hotel 4.0 41.6 Turn left onto US 1 at stop light Sunday 3.2 44.8 Oxidized contact on right 0.0 Leave Radisson and turn right onto Reynolds 1.8 46.6 Sudlow Lake Road th 0.8 0.8 Continue north on River Watch Parkway 6.6 53.2 Bear right to return to Radisson Hotel via 4 Street bridge OR CONTINUE ON US 1 FOR 4.3 5.1 Turn right onto I 20 LAST STOP 1.1 6.2 Savannah River 4.4 57.6 Bear right onto US 25 1.0 7.2 Turn right onto SC 230 2.5 60.1 Turn right onto Windsor Spring Road 0.6 7.8 Turn right into Smile Gas station 2.6 62.7 STOP 5, LOCALITY S; ALBION MEMBER STOP 1, LOCALITY K; CRETACEOUS ON (Buses may continue uphill beyond stop light and METAMORPHICS turn around in parking lot) Turn right onto SC 230 and proceed south Turn around and return toward downtown through North Augusta Augusta on Windsor Spring Road 3.0 10.8 Cross US 25 (Georgia Avenue) 2.6 65.3 Turn left onto US 25 (Peach Orchard Road) 1.0 11.8 Turn left onto SC 125 (Atomic Road) 2.5 67.8 Join US 1 (Gordon Highway) 2.0 13.8 Cross US 1 3.3 71.1 Turn left onto Walton Way 4.6 18.4 Beech Island, SC 0.6 71.7 Turn right onto 9th Street 0.1 18.5 Turn right to stay on US 278 0.6 72.3 Turn left onto Reynolds; Radisson is on right 0.2 18.7 Turn left to stay on US 278 A. Roadcut on county road 102, 2 mi south of Martin, Allen- 6.2 24.9 Caution light at Petticoat Junction; cross SC 302 dale County, South Carolina; south of Smith Lake Creek; near the Sandoz plant. The section shown in the figure is on 0.1 25.0 Hollow Creek the western side of the road. 0.2 25.2 Pull off on right beyond store Fine clastics up to about 10 ft thick exposed in the STOP 2, LOCALITY C; CRETACEOUS (?), ditches and in the lower part of the outcrop have the charac- PALEOCENE (?), EOCENE teristic color and the clay-lined burrows of the upper Eocene Tobacco Road Sand, although they are clayier than usual for Turn around and go north on US 278 the Tobacco Road.