Locally, it is part of the surfi

2021/05/21

Locally, it is part of the surficial aquifer system. Terrace sands were not mapped (refer to Healy [1975] for a discussion of the terraces in Florida). Thickness about 1,200 feet. Thickness up to 150 ft (46 m). Locally includes rocks of Silurian and Devonian age. The highly porous and permeable Miami Limestone forms much of the Biscayne Aquifer of the surficial aquifer system. Silurian(?) Persistent dolomite bed at base. Lateral and vertical lithic variability and gradation common. ARDMORE-SHERMAN- Limestone, gray to tan, granular, with greenish-gray shale and brown fine- to medium-grained sandstone; thickness, 600 to 1,100 feet, decreasing eastward. There is a general increase in quartz sand upward and a change in color to dark gray or brownish gray. The formation is about 25 m (82 ft) thick or less in the southern sheet. Siliceous rock fragments, mica, and feldspar are minor constituents. GALLATIN LIMESTONE--Gray and tan limestone. brown to gray liginitic clays with thin interbeds of lignite or micaceous sands; calcareous shale, petrified wood, and bluish fossilferous clay locally. Silicified corals and wood are occasionally present as well. The cycle is unconformity-bounded at top and bottom. Deposited as outwash sediments that collapsed due to melting of buried ice. Typically overlain by up to 45 ft (14 m) of loess. Rome Formation - shale and siltstone, variegated red to brown; interbedded fine-grained sandstone and shaly dolomite. Organics occur as plant debris, roots, disseminated organic matrix and beds of peat. Where these sediments exceed 20 feet (6.1 meters) thick, they were mapped as discrete units. CAMBRIAN ROCKS--On south flank of Granite Mountains, blue-gray and yellow mottled hard dense limestone interbedded with soft green micaceous shale; dull-red quartzitic sandstone at bae. He is a bacteriologist and has a score of assistants. These carbonates often contain organics. Shale, conglomerate, limestone and dolomite, sandstone, slate, hornfels, quartzite; minor pyroclastic rocks, Shale, limestone, and sandstone. Heterogeneous silt to gravel. Hawthorn Group, Peace River Formation, Bone Valley Member - The Bone Valley Member (originally the Bone Valley Formation of Matson and Clapp, 1909), Peace River Formation occurs in a limited area on the southern part of the Ocala Platform in Hillsborough, Polk and Hardee Counties. max thickness 30 ft. Graneros Shale- medium- to dark-gray, partly calcareous shale. SHAWNEE GROUP - cyclic deposits, limestone and shale with sandstone and siltstone. The lower contact of the Magothy in the Delaware River valley is difficult to place because the lower part of the Magothy is lithically similar to the underlying Potomac Formation. The Cliffwood beds are about 7.5 m (25 ft) thick in outcrop. Devonian Formations - Characterized by marked north-south facies variations. Hornerstown Formation - Sand, glauconite, clayey, extensively bioturbated, massive, medium-green in the shallow subsurface. Shiloh Marl Member - Consists of (1) a lower laminated, micaceous, locally fossiliferous (typically thin-walled, small mollusks), dark-gray clay interbedded with very fine grained sand and (2) an upper medium- to coarse-grained, gravelly, massive, pale-brown to medium-gray sand with scattered thin-walled mollusks. The Bison is gradational southward into reddish-brown shale; it thins southward and is about 120 feet thick. Unit is generally delta plain and lagoon deposits in South Carolina becoming open marine calcareous sand and clay in western Georgia. Trimmers Rock Formation - Olive-gray siltstone and shale, characterized by graded bedding; marine fossils; some very fine grained sandstone in northeast; black shale of Harrell Formation at base in Susquehanna Valley. 2 seperate circuits for HMA sand (washed): 1) HMA sand (a/k/a masons sand, 2) concrete sand. Knox Group, including (Ojb) Jonesboro Limestone - Dark bluish-gray, ribboned (silt and dolomite) limestone; numerous interbeds of dark-gray dolomite; quartz sandstone at base. Shark's teeth are often abundant.

Newcastle Sandstone- Gray, light-brown to yellow, discontinuously distributed siltstone, claystone, sandy shale, and fine-grained sandstone. Tabb Formtaion; Poquoson Member - Pebbly sand grading upward into muddy, fine-grained sand and sandy silt, at altitudes to 11 ft. (top of unit). This unit is generally mapped in areas of deep late Cenozoic stream incision and landscape degradation where thin Quaternary deposits (map units Qy, Qm, Qo) discontinuously blanket older deposits (map units Tsy or Tsm) and the two cannot be differentiated at the scale of this map. Unit is exposed only in pits dug below the overlying Woodbridge Clay Member. Conglomerate contains subangular to subrounded white quartz pebbles up to 2.5 cm (1 in.). The contact with the underlying Hornerstown Formation is disconformable; locally shell beds (bioherms) up to 1.5 m (5 ft) thick are found along the contact. The most recognized facies of the Anastasia sediments is an orangish brown, unindurated to moderately indurated, coquina of whole and fragmented mollusk shells in a matrix of sand often cemented by sparry calcite. Clinton Group, including Rochester Shale - Gray, thin-bedded calcareous shale and dark gray, thin- to medium-bed7 ded lenticular limestone; thickness 25 to 40 feet; Keefer Sandstone - White to yellowish-gray, thick-bedded protoquartzite and orthoquartzite; calcareous to west; thickness 10 feet in west, increases to 35 feet in east; and Rose Hill Formation - Olive-gray to drab, thin-bedded shale; some purple shale and gray, thin-bedded sandstone; including Cresaptown Iron Sandstone Member - Purple, hematite-cemented, quartzose sandstone; thickness 5 to 30 feet; occurs in lower half of formation; total thickness 300 feet in east, increases to 570 feet in west. Most of the gravel is 1.3 to 2.5 cm (0.5-1.0 in) in diameter, but pieces as long as 10 cm (4 in) are present. Undifferentiated sediments - Undifferentiated Quaternary Sediments - Much of Florida's surface is covered by a varying thickness of undifferentiated sediments consisting of siliciclastics, organics and freshwater carbonates. Wolfe (1976) assigned the pollen assemblage of the Marshalltown to the CA5A Zone considered to be Campanian. Mississippian, Silurian, Devonian, and Ordovician Formations - Structurally complex area containing all or portions of the Newman, Fort Payne, Chattanooga, Rockwood, and Sequatchie formations. Thickness 0 to about 100 feet; Harriman Formation - Light-gray novaculitic chert and tripolitic clay; and minor siliceous limestone. It is probable that the Cheesequake Formation contains the Santonian-Campanian boundary. pebbles The distribution of the Caloosahatchee and Fort Thompson Formation are shown on previous geologic maps by Cooke (1945), Vernon and Puri (1964) and Brooks (1982). Thickness about 800 feet. The Tinton was extensively dissected prior to deposition of the overlying Hornerstown Formation. (Mapped with Coffee except in Hardin County and southeastern Decatur County.) Sandy Hook Member - Sand, quartz, fine-grained, clayey, very micaceous, massive, dark-gray, fossiliferous. Also see Coarse Aggregate Producers. The Miami Limestone consists of two facies, an oolitic facies and a bryozoan facies (Hoffmeister et al. The best indication of age comes from pollen and spores obtained from dark carbonaceous clay. Note: one area in southeastern Bland County has landslides with intact stratigraphic units. Siderite in discontinuous beds and in flattened slab concretions as much as 1 m (3 ft) in diameter are common. Tinton Formation - Sand, quartz, and glauconite in varying proportions, very clayey and locally indurated by siderite into hard, massive ledges. Upper part of sequence contains numerous interbeds of basaltic siltstone and sandstone, basaltic tuff, and locally derived basalt conglomerate. (0-2 Ma), Gray to buff sandstone with interbedded shale and coal. The permeable sands of the Cypresshead Formation form part of the surficial aquifer system. Composite thickness of all Pre-Illinoian till may be up to 1,000 ft (305 m). Bryn Mawr Formation - High-level terrace deposits; reddish-brown gravelly sand and some silt. Formerly Lentine Aggregates and Pinnacle Materials, Inc.. Also see Coarse Aggregate Producers. Undifferentiated Lower Devonian and Silurian rocks - in northern Ulster County: Port Ewen thru Manlius Limestones; Rondout Dolostone; Binnewater Sandstone; High Falls Shale. Feldspar is a minor sand constituent. Other colors generally light tan or buff but locally may be pastel shades of almost any color. Local thin, pebbly zones with large fossil impressions occur in the middle of the formation. Laterally equivalent to entire Gizzard Group and all of Crab Orchard Mountains Group below Rockcastle Conglomerate. Plant fossil localities occur in adjacent Massachusetts. In addition, the basal glauconite beds tend to thicken somewhat downdip. Unit is characterized by sands containing locally abundant (F-VC grained) tourmaline and (F-VC grained) muscovite with some monazite and garnet. Locally, some of the beds are more clayey and have more calcareous shell fragments. Passaic Formation Limestone-clast Conglomerate facies - Limestone conglomerate unit (JTrpcl) is medium-bedded to massive, pebble to boulder conglomerate. (4-8 Ma), Moderately to strongly consolidated conglomerate and sandstone deposited in basins during and after late Tertiary faulting. Glenshaw: Cyclic sequences of shale, sandstone, red beds, and thin limestone and coal; includes four marine limestone or shale horizons; red beds are involved in landslides; base is at top of Upper Freeport coal. Bacons Castle Formation - Poorly sorted sand and laminated sand; clay and silt. The cool floral elements found in the overlying Belleplain and Wildwood Members were not found in the lower member. Overlain by 1-9 meters of loess. )), (Phanerozoic | Paleozoic | Devonian Carboniferous Mississippian-Late [Chesteran]), (Phanerozoic | Mesozoic | Cretaceous-Early [Comanchean), (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian [Missouri]), (Phanerozoic | Mesozoic | Cretaceous-Early [Comanchean]), (Phanerozoic | Cenozoic | Quaternary | Pleistocene-Middle(?) The lower 18.3 m (60 ft) consists of interbedded gravel; medium- to very coarse grained, poorly sorted sand; and thin to thick beds of medium- to dark-gray, very woody clay. ASPEN SHALE--Light- to dark-gray siliceous tuffaceous shale and siltstone, thin bentonite beds, and quartzitic sandstone. A middle Miocene age for the Belleplain was determined from diatoms. The Mount Laurel is gradational into the underlying Wenonah Formation. Gravel is composed of quartz and chert granules and pebbles. Includes the Mascot Dolomite, Kingsport Dolomite, Chepultepec Dolomite, Copper Ridge Dolomite. Total thickness, about 500 feet (150 m). The Tinton crops out in the northern part of the central sheet from Sandy Hook, Monmouth County, to the northernmost part of the Roosevelt quadrangle, near Perrineville. Unit resembles the Amboy Stoneware Clay Member, particularly in its lensing character.

Wilcox formation - Bashi marl member - glauconitic fossiliferous sand containing large calcareous fossiliferous concretions. Updip beds are cyclic with a fine- to medium-grained, somewhat clayey, fossiliferous, dark-green, glauconite-quartz (25 percent) sand at the base. Thickness about 700 feet. LAWTON- "West Spring Creek Formation" and "Kindblade Formation," Owk, dolomite, dolomitic sandstone, conglomerate, and limestone; thickness, approximately 2,000 feet (600 m). Maximum thickness unknown. Reedsville Formation - Olive-gray to dark-gray shale, siltstone, and fine-grained, thin-bedded sandstone having graded bedding; upper sandstone is very fossiliferous; includes Antes Formation (black calcareous shale) at base along Nittany Arch. Fossils present include abundant mollusks, corals, foraminifers and occasional vertebrate remains. Chilhowee Gourp; Cochran Conglomerate - Quartz-pebble conglomerate, gray pebbly arkose, siltstone and shale; irregular bedding, scour features, crossbedding common; maroon micaceous arkose and shale near middle and base. Gravel beds occur locally, especially in updip areas such as near New Egypt, Ocean County, in the Atlantic Highlands and in the highlands west of Barnegat, Ocean County, in the southern part of the central sheet and in mixed marine and nonmarine facies in the northeastern part of the southern sheet where gravel occurs in well-defined channels. Thickness 2,000 to 7,000 feet; (Oo) - Ottosee Shale - Bluish-gray calcareous shale, weathers yellow; with reef lenses of coarsely crystalline reddish fossiliferous limestone ("marble"). Includes units such as Sunflower Formation of Bushnell (1967) in Elko County, Battle Formation, Antler Peak Limestone, and Edna Mountain Formation in Lander and western Eureka Counties, and Wildcat Peak Formation in northern Nye County, ARGILLACEOUS LIMESTONE, CHERT, AND SHALE-Elko and Eureka Counties, ASH-FLOW TUFFS AND TUFFACEOUS SEDIMENTARY ROCKS, BANBURY FORMATION-Basalt, gravel, and tuffaceous sediments locally. Olive-brown sand, shale, and sandstone; marine shoreline and offshore sediment; as thick as 120 meters (400 feet). 0-50 feet thick. Peedee Formation - sand, clayey sand, and clay, greenish gray to olive black, massive, glauconitic, locally fossiliferous and calcareous. Composite thickness of all Upper Wisconsin till may be up to 300 ft (91 m). McALESTER TEXARKANA- Marl and clay, light- to dark- to brownish-gray, micaceous, calcareous, sandy, fine-grained sand, with interbedded chalky limestone; glauconitic marl and sand at base; same as lower Taylor Marl of Texas; thickness, about 100 feet. Northwest of Attleboro, Wamsutta overlies Diamond Hill Felsite as used by Skehan and Murray (in Skehan and others, 1979). Clay to boulder-size clasts primarily from igneous and metamorphic rocks of the central Black Hills. Approx. The pollen assemblage in the lower part of the unit is dominated by pine and oak with somewhat lesser amounts of hickory and basswood. Thickness ranges up to 160 feet, with top eroded in many places. More importantly, Olsson (1964) reported the late Campanian foraminifera Globotruncana calcarata Cushman from the upper part of the formation. Pick the area(s) youd like to see results in. A, T. sp. Admiral and Coleman Junction Formations, undivided, Alluvium in Rio Grande, subdivided into areas predominantly of sand, Beaumont Formation, areas predominantly sand. This sand thickens to over 23 m (75 ft) at the coast where it is part of the "800 foot" sand, the principal aquifer in the coastal region. Unnamed Formation at Cape May - Interbedded gravel, sand, and clay, massive to thickbedded. Biostratigraphically, the Potomac has been separated into pollen zones I, II, and III (Doyle, 1969; Doyle and Robbins, 1977). Chickasawhay Limestone - white to yellowish-gray fossiliferous, glauconitic limestone and soft marl. Most volcanic rocks are 20-30 Ma in southeastern Arizona and 15 to 25 Ma in central and western Arizona, but this unit includes some late Eocene rocks near the New Mexico border in east-central Arizona. max thickness 60 ft. Belleplain Member - Clay to silty clay at the base and sand at the top. Formerly Kent Sand & Gravel and Bluegrass Materials. Basal sand, quartz and glauconite, fine-grained, clayey, thin-bedded, dark-greenish-gray; middle part, quartz sand, very fine grained, thick-bedded, dark-gray, micaceous, and clayey silt with scattered and varying amounts of glauconite sand; upper part, quartz sand, fine-grained, clayey, thinbedded. Upper part may be Late Cambrian. (Olc) Unnamed (middle part of Knox Group) including (Olv) Longview Dolomite - Siliceous, gray, fine-grained, medium-bedded dolomite; interbeds of gray limestone in upper part. Organics occur as plant debris, roots, disseminated organic matrix and beds of peat. Thickness ranges from 49 to 84 m (160-275 ft) thick. Unit exposed only in the South Amboy and Keyport quadrangles.

In an effort to subdivide the undifferentiated sediments, those sediments occurring in flood plains were mapped as alluvial and flood plain deposits (Qal). Potomac Formation - Variegated silts and clays with beds of quartz sand. A loose aggregate of unlithified mineral or rock particles of sand size (1/16 to 2 mm); an unconsolidated deposit consisting essentially of medium-grained clastic particles. Lignitized wood fragments are also locally abundant in these beds but on average the wood pieces are much smaller than those seen in the basal beds. Amber occurs in some of the wood. Often exposures are not extensive enough to facilitate the collection of representative faunal samples to properly discern the biostratigraphic identification of the formation. Muscovite and feldspar are minor sand constituents. Thickness 350 to 800 feet; (Ok) Kingsport Formation - Gray, fine-grained, sparingly cherty dolomite with basal dense, gray limestone sequence. Along Delaware Bay, the Wildwood subcrops from near the Cohansey River to Fortescue, Cumberland County. The type locality on Pine Brook at Tinton Falls, Monmouth County, is in this downdip area. In addition, beds of quartz gravel are present in the Cliffwood near Riverside, Burlington County. Tabb Formation - Undifferentiated. Navesink Formation - Sand, glauconite, medium-grained, clayey and silty, massive, dark-gray to dark-gray-green, extensively bioturbated, locally contains large calcareous shells; sand-size mica, locally abundant; weathers light brown or red brown. Coffee Sand - Loose fine-grained sand, light-gray, sparsely glauconitic, locally interbedded with laminated lignitic clay. The basal beds have a reworked zone 0.3 to 1.2 m (1-4 ft) thick that contains fine- to very coarse grained sand and, locally, gravel. These sediments are generally light gray or tan. Eastward and in the intermediate subsurface, the Manasquan is primarily a clayey glauconite sand. lower Dorchester County) and Pocomoke River basin of Worcester County), and beach zone sands (e.g. Local arkose; grades eastward into coarse conglomerate close to eastern border fault. Locally the upper part of the unit is Pliocene in age. Includes: "Dog Creek Shale," Pdc, reddish-brown shale with thin beds of siltstone and dolomite; thickness, about 220 feet; gradational eastward into the Chickasha Formation. On these is placed 40 inches of fine sand. Includes Raritan and Patapsco Formations - Gray, brown, and red variegated silts and clays; lenticular, cross-bedded, argillaceous, subrounded sands; minor gravels; thickness 0 to 400 feet; Arundel Clay - Dark gray and maroon lignitic clays; abundant siderite concretions; present only in Baltimore-Washington area; thickness 0 to 100 feet; and Patuxent Formation - White or light gray to orange-brown, moderately sorted, cross-bedded, argillaceous, angular sands and subrounded quartz gravels; silts and clays subordinate, predominantly pale gray; thickness 0 to 250 feet. (Osv) Sevier Shale - Calcareous, bluish-gray shale, weathers yellowish-brown; with thin gray limestone layers; sandstone, siltstone, and locally conglomerate to the east. Contains some welded and nonwelded ash-flow tuffs, and minor rhyolite flows. ARDMORE-SHERMAN- Shale, maroon, arkose, and limestone conglomerate; thickness, 250 to 900 feet (subsurface), decreasing southward. GUERNSEY FORMATION--Blue-gray massive cherty limestone and dolomite. Formation characterized by local vertical and lateral facies changes.

Includes Schoonover Formation of Fagan (1962) and Reservation Hill Formation in Elko County, Farrel Canyon Formation in southwestern Humboldt County, Havallah and Pumpernickel Formations in Pershing, Lander, and parts of Humboldt Counties, and rocks originally considered a part of the Pablo and Excelsior Formations in northern Nye, northern Esmeralda, and southern Mineral Counties. Unit as much as 700 feet thick. TWIN CREEK LIMESTONE--Greenish-gray shaly limestone and limy siltstone. Carboniferous), (Phanerozoic | Paleozoic | Carboniferous Mississippian), (Phanerozoic | Paleozoic | Cambrian Ordovician), (Upper Triassic; possibly Lower Jurassic at top), (Upper Triassic; possibly Lower Jurassic at top plus Middle?