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l415 l44 CREEKSPRUCE 201l40l 5l1o ll5A 415p95 9l CREEKHALIFAX o92l5Al400 4p A1A 305 95 1 9l olplRIVERTOMAKABASIN TOMAKA1 31 36 42 40 39 42 26 23 BAYROSEPONCE DE LEON INLETNORTHRIVERINDIANRIVERHALIFAXBAYTRUMBULLBAY STRICKLAND 3 T 21 S 28 40' 28 50' CARTOGRAPHY BY JIM JONES & TED KIPERT 12 S29 00' T 20 S T 19 S T 17 S T 18 S 29 10' T 16 S R 31 E R 35 E R 34 E R 33 E R 32 E82 30' 81 00' 81 20' R 29 E R 28 E R 27 E81 30' 81 40' R 30 EOCEAN ATLANTIC400l4p92o600l 9l44l40Al40Al92o600l400l4p44l44l15l11l600l15l4p400l415l40Al40Al 15l40l40l40l40l9l95p95p9l5l1o1o5l305l17o15l o17l11 11lLake AshbySAMSULANEW SMYRNA BEACHLAKE HELEN DELAND ORMOND BEACH DAYTONA BEACH BEACH DAYTONA PORT ORANGELAKE GEORGEHarney Lake Monroe Lake Lake WoodruDexter LakeLake Dias Indian River LagoonJOHN F. KENNEDY SPACE CENTER EDGEWATERST.JOHNSRIVERRIVERJOHNSST.ST.JOHNSRIVERFLAGLER COUNTYFLAGLER COUNTYFLAGLER COUNTYPUTNAM COUNTY 81 10' 81 40' 81 30'R 27 E R 28 E R 29 E 81 20' R 30 E R 32 E R 33 E R 31 E 81 00' 81 10' 80 50'R 34 E R 35 E T 15 S29 20' T 14 S T 13 S T 20 S 28 40' T 21 S T 19 S 28 50' T 13 S T 14 S 29 20'T 15 S T 16 S 29 10' T 18 S T 17 S 29 00'T 12 SBREVARD COUNTY SEMINOLE COUNTYSEMINOLE COUNTYBREVARD COUNTYLAKE COUNTYLAKE COUNTYLAKE COUNTY SCALE4 MILES 3 2 1 0.5 0 6 KILOMETERS 5 4 3 2 1 0 N Qph THIS IS AN INTERIM GEOLOGIC MAP. EDITING AND EDGE MATCHING HAVE NOT BEEN COMPLETED. UPDATING AND CORRECTING ARE CONTINUING. Tc Qu Qu Qr Qu TQd Qu Tc Qu QrOPEN FILE MAP SERIES No. 8 FGS050692Qu Qu Qr Tc TQd Tc Qu Qu Qbd Qr Qu Qa Qbd VOLUSIA COUNTY QrSTATE GEOLOGIST AND CHIEF Preliminary eld mapping byFLORIDA1992 WALTER SCHMIDT LT.M. Scott, P.G.# 99 B.E. Lane EST.FLOR IDAGEO 1907 S COGIALR VEYUBY Qbd Qul GEOLOGIC MAP OFQph Qa Qph QaDEPARTMENT OF NATURAL RESOURCES FLORIDA GEOLOGICAL SURVEY Qa Qa Qa Qph Qa Undierentiated Quaternary sediments (Qu) are mapped in (eds.) Southeastern Geological Society Annual Field Trip peninsular Florida: in Pirkle, F.L., and Reynolds, J.G., Scott, T.M., 1988, The Cypresshead Formation in northern of the Coastal Plain of Georgia: Miocene through Holocene: Huddlestun, P.F., 1988, A revision of the lithostratigraphic units are often present. This unit is common below ten feet of shelly carbonate sediments). Peat and other organic-rich sediments silt, clay and "marl" (poorly consolidated, variably sandy, clayey, sediments (alluvium) (Qr). This unit is composed of quartz sands, tributaries in Volusia County are mapped as Holocene uvial Lowlands surrounding the St. Johns River and some of its near Ormond Beach and in pits along the Atlantic Coastal Ridge. sand and shell. It is well exposed along the Intracoastal Waterway This unit consists of variably lithied coquina and mixtures of barrier island, and the Atlantic Coastal Ridge, on the mainland. The Anastasia Formation (Qa) occurs along the coast, on the occurrences of the Anastasia Formation may be included in this unit undierentiated Quaternary sediments or Nashua Formation. Some fossils. The depositional environments include beach, marsh and depositional environment and may contain varying amounts of minerals. The sands are poorly to well sorted depending on the percentages of organic matter. The sands may contain heavy composed of sands, silts and clays that sometimes contain varying Pleistocene and Holocene coastal deposits (Qph). The sediments are rivers and streams are sediments referred to as undierentiated Along the present day coast,the associated lagoons and coastal streams follow the swales, coast parallel until encountering a surface expression of this unit controls the drainage pattern and undierentiated Quaternary sediments or Nashua Formation. The and beach ridges. This unit may lie unconformably(?) on Deposits of organic material may form in the swales between dunes sorted and unfossiliferous. The sands may contain heavy minerals. unit are generally ne to medium grained, moderately to well eastern half of Volusia County. The quartz sands comprising this Beach ridges and dunes (Qbd) were deposited over much of the similar to the Qu sediments and appear to have been deposited in mapped in southern-central Volusia County. These sediments are Undierentiated Quaternary "lagoonal" sediments (Qul) are or undierentiated Pleistocene sediments. Qbd and Qr units may Formation. This unit lies unconformably(?) on the Nashua Formation reworking has occurred and Qu may contain reworked Cypresshead were deposited under marine conditions although some uvial and there are accumulations of organic matter. These sediments numbers of mollusk shells. Surcial conditions are often swampy of sands, clayey sands and clays occasionally containing limited limited portions of western Volusia County. This unit is composed Guidebook, February 19-29, 1988, pp. 70-72. Georgia Geologic Survey Bulletin 104, 162p. due to the available data base. lagoonal sediments which lie unconformably(?) on older, elevation. REFERENCES larger stream perpendicularly crossing the ridges. lagoons landward of the coastal barrier islands. overlie Qu in areas where those units are recognized. GEOLOGIC MAP OF VOLUSIA COUNTY, FLORIDAsmall areas of western Volusia County. The Cypresshead was Dune sands of latest Tertiary or Quaternary age (TQd) are mapped in Hawthorn overlie the Cypresshead Formation in small areas of Group. the county, on the Deland Ridge, and unconformably overlies the variably shelly, clayey sand. It is mapped in the western part of Formation grades laterally down dip into the Nashua Formation, a in the subsurface. Huddlestun (1988) suggests that the Cypresshead Colors range from reddish-orange in exposed sections to olive gray minor percentages, particularly in the ner grained sediments. minor amounts and is generally kaolinite. Mica often occurs in occurrences of quartz gravel. Clay is commonly present in very from ne to very coarse, moderately to well sorted with common 1988). The Cypresshead Formation consists of quartz sands ranging late Tertiary, Late Pliocene Cypresshead Formation (Tc) (Scott, The oldest stratigraphic unit mapped in Volusia County is the the undierentiated sediments were less than 20 feet thick, the geology despite an often sparse data base. As a general rule, if were included in order to provide a more accurate picture of the lithostratigraphic units and informal units. Both types of units topographic maps. Geologic units identied include formal well cuttings, cores, natural and man-made exposures and Community Aairs. The geology of the county was mapped utilizing Environmental Protection Agency (EPA) and the Florida Department of hazards. Funding for this eort was provided by the U. S. a generalized base map to be utilized in predicting radon potential The geologic map of Volusia County, Florida was developed as T. Scott, P.G.# 99deposited in a shallow, nearshore, marine setting. underlying recognizable formation was mapped. by
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