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Vertical recharge to a confined limestone in northwest Sri ...

Jun 01, 1983  Vertical recharge to a confined limestone in northwest Sri Lanka. J. Hydrol., 63: 287--297. The water resources of a Miocene limestone aquifer in northwest Sri Lanka were inves- tigated. The limestone aquifer receives recharge although it is buried beneath a thick sequence of Quaternary deposits of low permeability which cover the whole basin.

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Field Trip to Puttalam - Jayantha Obeysekera ('Obey')

Preliminary Notes on Field Trip to the Confined Miocene Limestone Aquifer in Northeastern Sri Lanka, 24 September 2004 Kevin J. Cunningham1 and A.P.G.R. Lasantha Perera2 1U.S. Geological Survey, 3110 SW 9th Avenue, Fort Lauderdale, Florida, 33315 USA 2Water Resources Board of Sri Lanka, 2A Gregory’s Avenue, Columbo 7, Sri Lanka Date of trip: Saturday September 24, 2005

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Stratigraphy of the Miocene Baid formation, southern Red Sea coastal plain, Kingdom of Saudi Arabia by ... beds of limestone in the Baid formation from Al Qunfudhah area..... 35 10. Rose diagram showing direction of transport ... where it is confined between felsic and mafic volcanic rocks of the Jizan group. At Ad Darb and Al

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Confined deep water system development on the accretionary ...

Sep 01, 2012  Morphological features at the beginning of Early Miocene created confined depositional settings. Morphology of the Early Miocene is similar to recent topography. The ophiolite and small limestone blocks caused a confined depositional setting and led to the formation of the two channels of the Çukurhisar System.

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Miocene nonmarine rocks (CAMIc;0) - USGS

Jennings, C.W., 1985, An explanatory text to accompany the 1:750,000 scale fault and geologic maps of California: California Division of Mines and Geology, Bulletin 201, 197 p.

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Upper Cretaceous and Lower Tertiary Rocks Berkeley and San ...

Eocene sandstone, shale, and limestone, perhaps 1,000 feet thick, contain fossils suggestive of Capay or Domengine age. If the estimate of total thickness of Upper Cretaceous strata is correct, these beds lie west of the axis of maximum depositional thickness in the Late Creta­ ... Miocene and younger rocks have a wide distribution in the area ...

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Miocene - Wikipedia

The Miocene (/ ˈ m aɪ. ə ˌ s iː n, ˈ m aɪ. oʊ-/ MY-ə-seen, MY-oh-) is the first geological epoch of the Neogene Period and extends from about (Ma). The Miocene was named by Scottish geologist Charles Lyell; its name comes from the Greek words μείων (meiōn, "less") and καινός (kainos, "new") and means "less recent" because it has 18% fewer modern sea invertebrates than the ...

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GROUNDWATER RESOURCES OF SRI LANKA

Shallow Karstic Aquifer of Jaffna Peninsula The whole Jaffna peninsula is underlain by Miocene limestone formations which are generally 100 to 150 m thick and which are distinctly bedded and well jointed and are highly karstified.

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Geologic units in Sacramento county, California

Mesozoic volcanic rocks, unit 2 (Western Sierra Foothills and Western Klamath Mountains) (Jurassic) at surface, covers 4 % of this area. Undivided Mesozoic volcanic and metavolcanic rocks. Andesite and rhyolite flow rocks, greenstone, volcanic breccia and other pyroclastic rocks; in

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ABSTRACT: Distribution of Overpressure and its Prediction ...

limestone and shale sections in the area. Overpressure in Early Miocene limestone is confined in nature and overpressured pore fluid is developed probably due to fluctuating bathymetry and inability of pore fluid to escape. Since measured formation pressure data is scanty, the mud weight used while ...

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Geochemistry and diagenesis of Miocene lacustrine ...

A Late Miocene non-marine stratigraphic sequence composed of limestone, opal-CT-bearing limestone, porcelanite, marlstone, diatomaceous marlstone, dolomite, and tuffite crops out on eastern Samos Island. This lacustrine sequence is subdivided into the Hora Beds and the underlying Pythagorion Formation. The Hora Beds is overlain by the clastic Mytilinii series which contains Turolian (Late ...

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Confined deep water system development on the accretionary ...

The accretionary wedge of the KFB includes blocks of various sizes and age (mainly Mesozoic limestone) scattered within an Early Tertiary matrix (mass wasting deposits and shallow to deep marine sediments). At the beginning of the Miocene, transtensional tectonism led to the development of half-graben basins on top of the accretionary wedge.

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Oxygen and carbon isotope analysis of the Miocene ...

The lower Miocene to Mio-Pliocene sedimentary basin of Kerala consists of Quilon carbonate sequence (Lower-Middle Miocene), which is confined between two clastic units (Ambalapuzha and Mayyanad formations). The carbonate sequence is not extensive but restricted between Alappuzha in the north and Edava (Thiruvananthapuram district) in the south. Stable isotopic analysis on Quilon limestone for ...

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(PDF) Biostratigraphy and Depositional Environment of the ...

The BMB are confined within limited area (within a radius of 8 km. around Baripada), and are well exposed in the course of the. ... (T OC) values indicate the Miocene limestone of Baripada was.

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Diagenesis investigation: A Case Study from Early Miocene ...

Jun 21, 2021  The stratigraphic, facies, and diagenesis of limestone can be known: the age of limestone is Te-Tf or N7-N17 or Early-Late Miocene. The depositional environment is between inner-middle neritic (0 ...

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Limestone - Fossil Collectors - Prehistoric Life

Dec 16, 2020  Limestone is a good final resting place for organisms. While mollusks and trilobites are often flattened and disorted in shales, they remain plump in limestone. ... Leaf fossils are mostly confined to shales, ... Miocene limestone nodules found in one area of California often contain silicified insects, preserved as perfectly as the insects in ...

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Stratigraphy, micropaleontology, and paleoecology of the ...

Jan 01, 2002  Exposures of Miocene rocks in Qatar are confined to the south of the country in the Al-Nakhash, Al-Kharrara, and Abu-Samra areas . They are best exposed at Jebel Al-Nakhash near the southern end of the Dukhan oilfield. The Miocene rocks form irregular, isolated, benched hills that range in height from 15 to 80 m.

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USGS Regional Assessment of the Floridan Aquifer System

Apr 18, 2011  confined areas vs. unconfined areas Rate of decline Degree of Confinement. Declining Areas in Relation to Magnitude 1 and 2 Springs ... Miocene Series ... Soft micritic limestone and fine-grained dolomitic limestone,

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Geomicrobiology and Redox Geochemistry of the Karstified ...

Nov 11, 2010  The gypsum karst of the western Ukraine developed largely under artesian conditions. The Miocene aquifer is presently entrenched and dewatered over much of the territory, while it remains confined ...

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Salt Water Intrusion: An Introduction and Overview

MIOCENE UNIT 901 967 2189 1847 910 910 480 310 TER OR NO SAMPLE UNCONSOLIDATED SANDS, SIL 73, CLAYS TO CLAYEY SANDS, SILTS, CL4YS PHOSPHA SANDS CALCAREOUS LIMESTONE UPPER FLORIDAN POTENTIOMETRIC SURFACE, 1998 CHLORIDE OLIGOCENE UMT (Upper Floridan Aquifer) EOCENE 5000 Vertical 5000 scale greatly exaggerated 1 SH-3 Tybee SCA

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Habitat and Environment of Islands--Primary and ...

The North Coast limestone aquifer system consists of limestone, lesser amounts of dolomite, and minor clastic detritus of Oligocene to Pliocene age that form an unconfined upper aquifer and a confined lower aquifer; these aquifers are separated by a clay, mudstone, and marl confining unit.

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HA 730-G Floridan aquifer system text - USGS

The Suwannee Limestone (Oligocene age) also is a principal source of water, but it is thinner and much less areally extensive than the Eocene formations. The Tampa Limestone of Miocene age is part of the Floridan in only a few places where it is sufficiently permeable to be an aquifer. Both the Suwannee and the Tampa Limestones are discontinuous.

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(PDF) PETROGRAPHICAL AND MICROFACIES STUDY OF JERIBE ...

This study deals with the Middle Miocene Jeribe Formation in the Ashdagh Anticline in Darzila Village near Sangaw in Sulaimani Governorate, Iraq. Stratigraphic analysis has shown that Jeribe Formation consists of recrystallized and dolomitized,

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Geochemistry and diagenesis of Miocene lacustrine ...

A Late Miocene non-marine stratigraphic sequence composed of limestone, opal-CT-bearing limestone, porcelanite, marlstone, diatomaceous marlstone, dolomite, and tuffite crops out on eastern Samos Island. This lacustrine sequence is subdivided into the Hora Beds and the underlying Pythagorion Formation. The Hora Beds is overlain by the clastic Mytilinii series which contains Turolian (Late ...

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Characteristics of a Miocene intrabank channel in Batu ...

@article{osti_6916355, title = {Characteristics of a Miocene intrabank channel in Batu Raja limestone, Ramba field, south Sumatra, Indonesia}, author = {Longman, M W and Maxwell, R J and Mason, A D.M. and Beddoes, Jr, L R}, abstractNote = {Ramba field in the South Sumatra basin produces oil from lower Miocene coral and foraminifera-rich wackestones with secondary moldic and vuggy porosity.

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Graveyard of rhinos, horses and giraffes found in ancient ...

Aug 03, 2021  During the late Miocene, the region south of what is now Madrid was a mix of woodland and grassland, dotted with watering holes sunk into cavities in the underlying limestone

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(PDF) Biostratigraphy and Depositional Environment of the ...

The BMB are confined within limited area (within a radius of 8 km. around Baripada), and are well exposed in the course of the. ... (T OC) values indicate the Miocene limestone of Baripada was.

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USGS Regional Assessment of the Floridan Aquifer System

Apr 18, 2011  confined areas vs. unconfined areas Rate of decline Degree of Confinement. Declining Areas in Relation to Magnitude 1 and 2 Springs ... Miocene Series ... Soft micritic limestone and fine-grained dolomitic limestone,

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Limestone - Fossil Collectors - Prehistoric Life

Dec 16, 2020  Limestone is a good final resting place for organisms. While mollusks and trilobites are often flattened and disorted in shales, they remain plump in limestone. ... Leaf fossils are mostly confined to shales, ... Miocene limestone nodules found in one area of California often contain silicified insects, preserved as perfectly as the insects in ...

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Hydrochemistry and solution rates in gypsum karst: case ...

May 11, 2005  The confined conditions of the Miocene aquifer system were the primary conditions throughout the whole region prior to the Late Pleistocene. Later, uplifts in the interior parts of the platform and accompanying denudation and deep linear erosion have caused the formation and expansion of subjacent and entrenched karst zones.

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STRENGTH PROPERTIES OF ROCKS AND ROCK MASSES 1 ...

2.6 Confined Compression Tests (Triaxial Tests) Confined compression tests can be conducted usi ng a confining vessel similar to the one used for measuring the strength of soils. The so-called Hoek cell is often used in this test. Figure 6a shows the original Hoek cell and Figure 6b is a modified confining cell developed at the

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Miocene epoch Article about Miocene epoch by The Free ...

Miocene epoch. (mī`əsēn), fourth epoch of the Tertiary period Tertiary period. , name for the major portion of the Cenozoic era, the most recent of the geologic eras (see Geologic Timescale, table) from around 26 to 66 million years ago. The name Tertiary was first applied about the middle of the 18th cent.

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Geology of Saudi Arabia - Wikipedia

Geologic history, stratigraphy and tectonics. Saudi Arabia is underlain by the Precambrian igneous and metamorphic rocks of the Proterozoic Arabian Craton. Up to 5.5 km (3.4 mi) of sedimentary rocks from the Cambrian through the Pliocene accumulated on the shield, including many oil-bearing units.. Within these younger rocks, a large western facing escarpment formed in central Saudi Arabia ...

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Time Constraints on the Evolution of Southern and Central ...

The beginning of the thrust belt formation is constrained by the so called Nido Limestone, which was deposited after the breakup of the South China Sea (~35 Ma) until the Early Miocene. Age data available from offshore wells give an age of 28 – 25 Ma near the base of the Nido Limestone.

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Karst Aquifers: Upper Floridan and Biscayne Aquifers

The top of the FAS is confined by late and middle Miocene series rocks of the upper confining unit (where present) and the bottom is confined by early Paleocene series rocks. From top to bottom, the major hydrogeologic units of the FAS are the Upper Floridan aquifer (UFA), middle confining and composite units, and Lower Floridan aquifer (LFA).

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Seismic expression of miocene carbonate platform and ...

Apr 01, 2021  A substantial proportion of proven oil and gas reserves of the world is contained in the carbonate reservoir. It is estimated that about 60% of the world’s oil and 40% of gas reserves are confined in carbonate reservoirs. Exploration and development of hydrocarbons in carbonate reservoirs are much more challenging due to poor seismic imaging and reservoir heterogeneity caused by

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HA 730-G Floridan aquifer system text - USGS

The Suwannee Limestone (Oligocene age) also is a principal source of water, but it is thinner and much less areally extensive than the Eocene formations. The Tampa Limestone of Miocene age is part of the Floridan in only a few places where it is sufficiently permeable to be an aquifer. Both the Suwannee and the Tampa Limestones are discontinuous.

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