Ogallala formation

The Ogallala Formation of Tertiary (Pliocene) age is the principal aquifer in the Southern High Plains of western Texas and eastern New Mexico. This heavily pumped aquifer supplies practically all the water used for irrigation, municipal, industrial (except oil-field repressuring), and domestic purposes. Although the ground water in the Ogallala Formation in the Southern High Plains is common ...

Ogallala: Formation: Ogallala Formation: Aquifer Type: Unconfined: Well Depth (ft below land surface) 253.00: Instrument: Float & Weight: Transmission: Satellite: Groundwater Conservation District: Panhandle GCD: Groundwater Management Area: 1: Estimated Land Elevation (ft above sea level) 2774 Location (lat, long) (35.5744444, -100.4341667)Unconformably overlies Valentine Formation of Ogallala. Glass shards, from Swallow and Davis ashes in lower part of Ash Hollow Formation, yielded Ar/Ar ages from about 11.5 to 12.2 Ma (citing C.C. Swisher, III, 1992, Univ. California-Berkeley PhD dissert.). Fossils.An extensive saline plume (> 250 km2) within the regionally important unconfined aquifer in the Neogene Ogallala Formation overlies the Panhandle oil and gas field in the Southern High Plains ...Unconformably overlies Valentine Formation of Ogallala. Glass shards, from Swallow and Davis ashes in lower part of Ash Hollow Formation, yielded Ar/Ar ages from about 11.5 to 12.2 Ma (citing C.C. Swisher, III, 1992, Univ. California-Berkeley PhD dissert.). Fossils.Ant-nest ichnofossils in honeycomb calcretes, Neogene Ogallala Formation, High Plains region of western Kansas, U.S.A. Smith, Jon J. / Platt, ... Formation processes of shell concentrations in the Lower Cretaceous estuarine sediments of the Okurodani Formation, Tetori Group, Gifu Prefecture, central Japan.The Great Plains contains the High Plains (or Ogallala) Aquifer, the largest aquifer system in the United States that stretches from South Dakota to Texas, and has a myriad of rivers, lakes, and prairie wetlands. Vast amounts of groundwater are contained within the sands and gravels with silt lenses of the Miocene age Ogallala Formation, the ...

Rests (usually conformably) on Gering formation, where that formation is present; where Gering is absent, on Brule clay. There is possibility upper member of Gering formation may be basal part of Arikaree formation. The Arikaree enters Nebraska from Wyoming, and thins out beneath Ogallala formation in eastern part of Banner County.The Ogallala Formation was deposited by streams flowing out of the Rocky Mountains about 3.8 million years ago. Those streams created an enormous alluvial fan extending out from the Rockies. It was originally a continuous layer up to 800 feet (240 m) thick that covered eastern Colorado and western and central Kansas, and extended north into ...Ogallala Formation (Pliocene) at surface, covers 36 % of this area. CIMARRON- Generally semiconsolidated clay, silt, sand, gravel, and caliche 0 to 400 feet thick. BEAVER- Interbedded sand, siltstone, clay, gravel lenses, and thin limestone. Caliche common near surface but occurrence is not limited to the surface.The Ogallala Formation has a thickness from 0 to approximately 800 feet, with an average saturated thickness of 95 feet . Throughout most of the Ogallala Aquifer area, withdrawal of water has exceeded the recharge rate. Water levels have declined in excess of 300 feet in the last 50 to 60 years. The use of groundwater from the Ogallala is ...Frye (1945a) presented an hypothesis of "Algal limestone" formation in lakes that occupied consequent depressions and abandoned channel segments, after deposition had virtually ceased on the piedmont plain of alluviation that marked the top of the Ogallala deposits. Plate 2--Ogallala formation in west-central Kansas. A.The Ogallala Formation was named by Darton (1899) from exposures in Southwestern Nebraska. In 1920 Darton designated the type locality as being near Ogallala Station in western Nebraska. Since the work of Darton, the most significant studies of the Ogallala in western Kansas have been by Elias (1931), Smith (1940), and Frye, Leonard, and ...

Four-year project delivers science-based solutions for managing Ogallala Aquifer. By Anne Manning. Published July 6, 2020. Stretching 174,000 square miles across the High Plains, bringing life to fields of corn, cotton and wheat, lies the vast geologic resource known as the Ogallala Aquifer. The largest freshwater aquifer in the world, the ...The Ogallala Aquifer region, located in the Great Plains of the central United States, is the largest freshwater aquifer in North America, supporting one of the most agriculturally productive regions in the world. ... The Ogallala formation has been described as braided stream deposits made up of broad, thinning, and shallow channels throughout ...The Ogallala Formation of late Miocene to early Pliocene age consists of heterogeneous sequen-ces of coarse-grained sand and gravel in the lower part, grading upward into clay, silt, and fine sand. In Texas, the Panhandle is the most extensive region irrigated with groundwater. In 2008, almost 96 percent of the water pumped from the Ogallala ...This list of fossil sites is a worldwide list of localities known well for the presence of fossils.Some entries in this list are notable for a single, unique find, while others are notable for the large number of fossils found there. Many of the entries in this list are considered Lagerstätten (sedimentary deposits that exhibits extraordinary fossils with exceptional …

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Geologic unit mapped in Kansas: massive to cross-bedded, generally arkosic sand, silt and gravel, locally cemented with calcium carbonate; also contains limestone, volcanic ash, diatomaceous marl, opaline sandstone and bentonitic clayShale, calcareous, thinly laminated, dusky yellow, yellowish gray, light olive-gray, dark gray. Marine megafossils abundant in some beds. Outcrop thickness of 53 feet measured at northwestern margin of McKenzie Lake. Correlative with Fredericksburg Group, undivided. Lies below Ogallala Formation (Pliocene) and above Antlers Sand (Lower Cretaceous).By J. C. Frye, A. B. Leonard, and H. D. Glass, 1982, 41 pp., 4 tables, 10 figs., 1 appendix. This study defines the western limits of the Ogallala Formation (upper Tertiary) west of the Pecos River and documents the late Cenozoic geology of the region, including fragmentary deposits of early Pleistocene age and molluscan faunas of Wisconsinan and Holocene age. Included is an appendix ...The present study defines the western limits of the Ogallala Formation (upper Tertiary) and documents the late Cenozoic geology of the region including fragmentary deposits of …The waters in the alluvium are in general considerably harder than the waters from the Ogallala formation or the Dakota formation. The Ogallala is the principal water-bearing formation in the county. It is composed of structureless silt and fine sand together with some coarse sand and gravel and ranges in thickness from a few feet to 250 feet ...

P, Permian cocks: PPS, Sangre de Cristo Formation (Pennsylvanian-Permian), Area underlain by the Morrison Formation (Jurassic) where depth to top of Morrison is less than 5,000 ft. Area underlain by the Ogallala Formation (Tertiary). placer Scale 1: I.OOO,OOO Contact of area underlain bv Morrison Formation (Jurassic) or Ogallala FormationVertebrate fossils date the Ogallala Formation (or Group) as Miocene-Pliocene (Wood et al., 1941; Schultz, 1977). In general, the Ogallala in the Panhandle consists of a basal conglomerate, medial sandy interval and an upper calcrete-rich interval. These units are all of fluvial origin except for the calcrete that is pedo­ genic.However, its crown jewel is the Scotts Bluff National Monument, an 800-foot-high natural rock formation offering stunning North Platte River vistas, immersive country, and cityscapes, including the equally iconic Chimney Rock. ... Ogallala View of Front Street in Ogallala, Nebraska, via YULIYAPHOTO / Shutterstock.com.Ogallala Formation: Ogallala Silicified Sediment AKA: Ogallala Chert: Ranges from a buff to a reddish color or gray. Quartz inclusions form speckles in the material. Northern Texas: Ogallala Formation: Owl Creek Black Chert Edwards Chert variation: Ranges from a dark gray to black, small white speckles may be present. Central TexasThe Cenozoic (Pliocene) Ogallala Formation covers about 174,000 square miles from Texas to South Dakota. 4 While it's only 20 to 40 feet thick in some locations, it increases to over 700 feet across much of the Great Plains. Igneous and metamorphic cobbles in the basal conglomerate of the Ogallala layer are sourced from the Rocky Mountains ...Ogallala Formation (Pliocene to Miocene) at surface, covers 50 % of this area. Ogallala Formation. Quartermaster Formation and Whitehorse Group, undivided (Permian; Guadalupe Series) at surface, covers 12 % of this area. Quartermaster Formation and Whitehorse Group, undivided.Moss opal is found in the Ogallala Formation and contains inclusions of various iron minerals. The stone's inclusions resemble moss's small collection of branching tendrils. Some refer to moss opal as "dendritic opal" because the inclusions could be called dendrites. The most common iron mineral present in moss opal is manganese oxide.base of the Ogallala Formation to the potentiometric surface. The saturated thickness in Oklahoma ranges from more than 400 feet to less than 50 feet. Natural recharge to the aquifer from precipitation occurs throughout the area but is extremely variable. Dryland agricultural practices appear to enhanceNeither do the Trujillo and Ogallala Formations—the next-highest in the canyon. The supposedly 10-million-year-old Ogallala, the caprock that forms the canyon's upper rim, stretches from Texas all the way up to South Dakota. 4 My daughter Abby and I could span our hands across this assumed 200-million-year gap. A total lack of ruts or ...The Neogene Ogallala Formation hosts one of the most important and endangered aquifers in North America. Outcrops in western Kansas expose stacked paleosols and associated calcretes that are being studied to better understand subsurface stratigraphic architecture. The calcretes also preserve a suite of trace fossils that can be used to ...

As the sediments of the Ogallala Formation are sourced in the Rocky Mountains, this question has been intimately linked to what process drove this major late Cenozoic erosional event, producing ...

Publications. Groundwater is a valuable resource both in the United States and throughout the world. Groundwater depletion, a term often defined as long-term water-level declines caused by sustained groundwater pumping, is a key issue associated with groundwater use. Many areas of the United States are experiencing groundwater depletion.water created the aquifer, and the water sitting in the Ogallala Formation is ancient glacial water from the Rocky Mountains. Actually, the waters of the aquifer, like groundwater generally, is not sitting still but slowly shifting east about 12 inches per day toward the ocean.Ogallala Formation (Pliocene) at surface, covers < 0.1 % of this area. CIMARRON- Generally semiconsolidated clay, silt, sand, gravel, and caliche 0 to 400 feet thick. BEAVER- Interbedded sand, siltstone, clay, gravel lenses, and thin limestone. Caliche common near surface but occurrence is not limited to the surface.the Ogallala Formation, from 27,160 to 35,000 B.P.; and on caliches from 2 to 10 ft below the top of the Ogallala (Zones 2-4), from 30,880 to 43,100 B.P. The radio-carbon dates are apparent ages and do not indicate the time of initial deposition of the caliche. The dates reflect modifications of the calcium carbonate by events during lateSymposium papers describe elements of the stratigraphy, biostratigraphy, hydrology, and geomorphology of the Ogallala and Blackwater Draw Formations. CONTENTS Introduction Acknowledgments Depositional facies of the Miocene-Pliocene Ogallala Formation, northwestern Texas and eastern New Mexico, by T. C. Gustavson and D. A. WinklerOther colors generally light tan or buff but locally may be pastel shades of almost any color. The Laverne and Rexroad Formations of Pliocene age and the Meade Group and Odee (of local usage) and other formations of Pleistocene age occur locally and are included with the Ogallala Formation, 0-700 feet thick.The southern High Plains of Colorado, an area of about 2,800 square miles in the southeastern part of the state, is underlain by the Ogallala Formation of late Tertiary age, The southern High Plains of Colorado extend from the Colorado State line on the east and the ans south to the edge of the Ogallala Formation on the north and west. The Ogallala Formation is an unconsolidated or partly ...The Ogallala Formation was deposited by streams flowing out of the Rocky Mountains about 3.8 million years ago. Those streams created an enormous alluvial fan extending out from the Rockies. It was originally a continuous layer up to 800 feet (240 m) thick that covered eastern Colorado and western and central Kansas, and extended north into ...Ogallala Formation (Pliocene to Miocene) at surface, covers 12 % of this area. Ogallala Formation. Antlers Sand (Early Cretaceous) at surface, covers 12 % of this area. ... Quartermaster Formation; North and central Texas including panhandle. Terrace deposits (Pleistocene and Holocene) at surface, covers 0.1 % of this area.ACT NOW CO FY23 Forest Health. The Ogallala Aquifer, also known as the High Plains Aquifer, is a vast yet shallow underground water table aquifer located beneath the Great Plains in the United States. It is one of the world's largest aquifers and covers an area in portions of eight states, which include Colorado, South Dakota, Nebraska, Wyoming ...

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The Ogallala Formation is the principal geologic unit in the High Plains aquifer in eastern Colorado and New Mexico. The Ogallala generally consists of an unconsolidated and poorly sorted sequence of gravel, sand, silt, and clay. Moderately to well-cemented zones within the Ogallala are resistant to weathering and form ledges in outcrop areas.The Ogallala Formation unconformably overlies Permian, Triassic, Jurassic, and Cretaceous strata and consists primarily of heterogeneous sequences of coarse-grained sand and gravel in the lower part grading upward into fine clay, silt, and sand. Water-bearing areas of the Ogallala Formation arePhotomicrograph of transverse section of large (3 cm diameter) rhizolith from Miocene Ogallala Formation (Fig. 1, loc. 7; south side of Highway 34, east of Wray, CO). Note dotted micrite and transverse, longitudinal, and oblique sec- tions of small rhizoliths with epidermal cell structure preserved by opal (arrow). Plane light. be compared ...The northern boundary of the Raton section is placed somewhat indefinitely at the northern limit of the area injected by igneous dikes. The eastern boundary of the Raton section is at the eastern …Abstract. The undifferentiated Quaternary and Ogallala Formation sequence in the Northwest Kansas Groundwater Management District 4 (GMD 4) is best described as a highly heterogeneous assemblage of fluvial and eolian sediments. These sediments form the Ogallala portion of the High Plains aquifer. An improved understanding of the local ...The Chiquita series consists of very deep, well drained, moderately permeable soils that formed in loamy alluvium and/or loess of Holocene age over the Ogallala Formation of Miocene-Pliocene age. These soils are on gently to strongly sloping stream terraces and stream terrace remnants on hillslopes of the Southern High Plains, Breaks (MLRA 77E ...Mammal trackways preserved in the Miocene-Pliocene Ogallala Formation of eastern New Mexico represent the first report of mammal fossils-from this unit in New Mexico. These trackwavs are Dreserved as infillings in a conglomerate near the base of theMoss opal is found in the Ogallala Formation and contains inclusions of various iron minerals. The stone's inclusions resemble moss's small collection of branching tendrils. Some refer to moss opal as "dendritic opal" because the inclusions could be called dendrites. The most common iron mineral present in moss opal is manganese oxide.rocks, are called the Ogallala Group (formerly the Ogallala Formation) because the rocks are now subdivided into two or more formations (the defi-nition of a group). A number of anom-alously thick, large-grained volcanic ash beds are also found in the Ogallala Group. 6. A few of these ash beds con-tain large vertebrate fossils. 1. Oard, M.J., 2008.San Angelo Formation. Blaine Formation (Permian; Guadalupe Series) at surface, covers 0.9 % of this area. ... Clear Fork Group. Ogallala Formation (Pliocene to Miocene) at surface, covers 0.3 % of this area. Ogallala Formation. Terrace deposits (Pleistocene and Holocene) at surface, covers 0.3 % of this area. ….

The Ogallala is a "very fragile ecosystem, literally made of sand," she says. "To have a pipeline crossing that region is just mind-boggling." ... "'I've spent my career drilling holes to and through the Ogallala Formation. I've probably seen as much of the Ogallala as anybody,' he says on camera. 'There's a misconception that ...The Ogallala Formation is a late Miocene to early Pliocene unit which forms the cliffs and ledges at the very top of the canyon. It is composed of sandstone, siltstone, and conglomerate eroded from a late Cenozoic uplift of the Rocky Mountains , and is separated from the lower Trujillo Formation by a disconformity , representing a long hiatus.Laramine Formation (interbedded sands and coal), Pierre Shale (fine gray muds), Niobrara Limestone, Benton Shale (black muds), Dakota Formation (beach and sand bars) ... Wet Mountain Valley and Ogallala Formation of the High Plains Aquifer (CGS, 2002, 2004). Colorado's poorly consolidated to unconsolidated sediment aquifers. Recreated from CGS ...In 2001, Kansas formed a special citizens' committee to advise the governor and legislature on potential groundwater conservation policies (Ogallala Aquifer ...Ogallala Formation (Pliocene) at surface, covers 6 % of this area. CIMARRON- Generally semiconsolidated clay, silt, sand, gravel, and caliche 0 to 400 feet thick. BEAVER- Interbedded sand, siltstone, clay, gravel lenses, and thin limestone. Caliche common near surface but occurrence is not limited to the surface.The southern Panhandle of Nebraska and the adjoining parts of southeastern Wyoming and northeastern Colorado are unusual places to examine the geologic history of the Ogallala Formation because they are much closer to the source areas of much of the sediment which makes up the unit than are other sites along the Ogallala outcrop belt. This study in Nebraska combined with results of earlier ...The Ogallala Formation of late Tertiary age was described first by Darton in some detail from study of the unit in western Nebraska. Darton also identified Tertiary sediment and rock layers older than the Ogallala, called the Arikaree Formation, Gering Formation, and the still older Brule Clay in parts of western Nebraska. ...The Ogallala Aquifer is a shallow table aquifer that sits under eight states ranging from South Dakota south to Texas and New Mexico. It is a major source of irrigation water throughout the region. Formation of the Ogallala Aquifer Before the Aquifer formed, the land now known as the Great Plains looked nothing like it does now.What remains in the Ogallala formation is mostly fossil water drawn from the Rockies long ago. There is no massive and perpetual recharge (today it is a paltry inch-a-year trickle down) for most recent geological history. The High Plains aquifer is like a flat, sandy beach where the tide has recently gone out; no new water comes in at the upper ... Ogallala formation, [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1]