intraclastic limestone skeletal

INTERPRETATION DESCRIPTION

algal-laminated, dolomitic limestone Sandy dolostones, wavy laminated and horizontal bedded medium bedded, intraclastic, peloidal, skeletal grainstones grading to dolostone with this laminaes of skeletal mudstones and algae lamination thin bedded skeletal-peloidal …

Sedimentology and sequence stratigraphy from a mixed ...

 · Skeletal and oolitic packstones to grainstones and intraclastic rudstones with sharp, erosive basis are commonly recorded. The mid interval is usually represented by microbial deposits (up to ~ 1.5 m thick), typically stratiform, domical and columnar stromatolites ( Fig. 6 i–j).

A Late Cretaceous epeiric carbonate platform: the Haftoman ...

 · The upper part is dominated by thin-bedded bio-/intraclastic limestone units including several rudist biostromes and bouquets. A first exposure horizon is located near the 70-m level (Fig. 5d). Further up, bedded rudist-bearing intraclastic limestone prevails; at 94 m, another exposure horizon occurs. Lower Haftoman Formation at Kuh-e-Kamsun

GEOLOGICAL SURVEY OF ALABAMA QUADRANGLE SERIES …

Bangor Limestone (Upper Mississippian)—Predominantly light- to dark-gray, bioclastic and oolitic limestone. Lower part contains light- to medium-gray, thin- to medium-bedded, bioclastic and intraclastic lime mudstone/wackestone. Irregular nodules and thin beds of black, dense chert locally occur near the base.

Sequence stratigraphy of the Middle Cambrian Daegi ...

 · Facies association 2 is composed of oolitic limestone, grain-supported skeletal limestone, Epiphyton-dominant microbial limestone and intraclastic limestone. This facies association represents deposition in wave- or current-agitated, shallow subtidal environments such as a grain shoal at or near wave base.

Geologic units in Illinois (state in United States)

Silurian System undivided (Silurian (Llandovery to Pridoli)) at surface, covers 11 % of this area. Silurian System undivided, includes Sexton Creek Limestone, St. Clair Limestone, and Moccasin Springs Formation in southern Illinois; includes Wilhelmi Formation, Elwood Dolomite, Kankakee Dolomite, Joliet Dolomite, Sugar Run Dolomite, and Racine Dolomite in northeastern Illinois; includes ...

(PDF) Lower Triassic mixed carbonate and siliciclastic ...

The intraclastic limestone matrixes consist of poorly sorted mudstone and marl. Cracked carbonate layers and beds are commonly found in Facies 1b as well as in Facies 1a.Some beds of Facies 1b consist of intraclastic limestone characterized by imbrication …

Geolex — RockGrove publications

 · Underlies Nora Member of Shell Rock. Graphic sections, nomenclature charts. Is dominated by pelleted to skeletal limestone and dolomite, in part vuggy. Poorly fossiliferous. Cross-bedded calcarenites locally in upper beds. Also includes shales and shaly limestones. Strata may be laminated, intraclastic, brecciated, mudcracked, birdseye-bearing.

Sequence stratigraphy of the Middle Cambrian Daegi ...

Abstract The sediments that comprise the Middle Cambrian Daegi Formation in eastern central Korea are interpreted to have been deposited in a carbonate ramp setting. The Daegi Formation consists of nine lithofacies; argillaceous rock, ribbon rock, oolitic limestone, skeletal limestone, microbial limestone, intraclastic limestone, micritic limestone, bioturbated limestone and crystalline ...

Diagenetic History of the Chuping Limestone at Bukit ...

skeletal or any carbonate material to cementation and neomorphism, recrystallization and dolomitization (Flugel ... breccia (intraclastic limestone), dolomites, mudstones, wackestones, packstones, grainstones and oolitic limestone as shown in Figure 2. The overall sequence is made up of

Sequence stratigraphy of the Middle Cambrian Daegi ...

The Daegi Formation consists of nine lithofacies; argillaceous rock, ribbon rock, oolitic limestone, skeletal limestone, microbial limestone, intraclastic limestone, micritic limestone, bioturbated limestone and crystalline limestone, which are grouped into three facies associations presenting, from base up, outer ramp, grain shoal and inner ...

Tectonic and paleogeographic controls on development of ...

 · (C) Intraclastic limestone, core KZ7 at 2814.5 m (9234.0 ft; M4 Member of the Majiagou Formation). (D) Intraclastic packstone or grainstone (late-stage fracturing) (MF3c) showing subangular and poorly to moderately sorted clasts of various

Unusual intraclastic limestones in Lower Triassic ...

The term "anachronistic facies" was originally assigned to flatpebble conglomerates (Sepkoski et al., 1991), but subsequent works on a variety of anomalous sediments or biosedimentary structures ...

Petrology of Mississippian carbonate eolianites and ...

 · The Ste. Genevieve Limestone and Cedar Bluff Group of Mississippian age, both important sources of hydrocarbons in the Illinois basin, were traced from a subsurface stratigraphic section in White County, Illinois (described by Swan in 1963, across Gibson and Daviess Counties, Indiana, using electric logs and sample descriptions from 84 wells.

Facies Analysis, Sedimentary Petrology, and Reservoir ...

Limestone: a basal skeletal unit, a middle peloidal unit, and an upper, oolitic dolomite unit. The more offshore Tully core is composed of skeletal grainstone, with fewer shallow-water carbonate and siliciclastic deposits. Discontinuity surfaces (hardgrounds, firmgrounds, and change

The mid-Cretaceous Debarsu Formation (Upper Albian–Middle ...

 · The upper part consists of thick-bedded skeletal and intraclastic limestone with cross-beds and foresets. Serpulid rudstone occurs as intercalated beds (Fig. 4i). In the uppermost beds, large coiled recumbent rudists of the genus Ichthyosarcolites sp. in inferred life position are common (Fig. 4g).

PF

intraclastic-dolomitic wackestone peloidal-intraclastic-algal grainstone intraclast-skeletal-argillaceous packstone;debris-flowstructures calcareousshale peloidal-algal-intraclastic packstonetograinstone algal-intraclastic-peloidal grainstone skeletal-intraclastic-dolomitic wackestone intraclastic-skeletal-dolomitic wackestone intraclastic-skeletal

Lithology | Geologic Overview of the Trenton Group

By far the most-dominant carbonate grain type in the Trenton Limestone, skeletal fragments from echinoderms, arthropods such as trilobites and ostracodes, bryozoans, brachiopods, molluscs, sponges etc. make up significant portions of these limestones. The taphonomy or state of preservation of these fossil types helps to constrain the range of ...

KGS--Bulletin 209--Greenhorn Limestone of Kansas--Petrology

Figure 17--Petrologic features of skeletal and intraclastic limestone. A) Photomicrograph of Inoceramus-prism biosparite from middle part of Lincoln Member at Locality 1. Plane-polarized light [bar is 1.0 mm]. B) Photomicrograph of foraminiferal biosparite from middle part of Lincoln Member at Locality 16. Plane-polarized light [bar is 1.0 mm].

KGS--Bulletin 257--The Permian System in Kansas ...

Bader Limestone--The three members of the Bader Limestone are, in ascending order, the Eiss limestone, Hooser shale, and Middleburg limestone (fig. 23). Intraclastic beds occur locally at the base of the Eiss and Middleburg, where they truncate underlying …

280 Association Round Table

Limestone reservoir fades are transitional, open to restricted-marine slightly intraclastic, skeletal wackestone or packstone fades. Dolostone reservoir fades are restricted-marine mudstone to skeletal mudstone and pelletal wackestone or packstone. Northeast of the …

Small shelly fossils from the early Cambrian Yanjiahe ...

skeletal fossils during the early Cambrian has also been envisioned as ... phosphatic intraclastic dolostone or limestone in the lower part (Bed 2) and top part (Bed 5) of the Yanjiahe Formation ...

Madison Group (Mississippian) reservoir facies of ...

Both limestones and dolostones are productive in southern Nesson anticline. Limestone reservoir facies are transitional, open to restricted-marine slightly intraclastic, skeletal wackestone or packstone facies. Dolostone reservoir facies are restricted-marine mudstone to skeletal mudstone and pelletal wackestone or …

(PDF) Lithology and Diagenetic Processes of the Baluti ...

b) Photomicrograph of stylolite filled up with Fe-oxides in the limestone sample. c) Photomicrograph of pyrite patches filling some voids in limestone sample. d) Photomicrograph of pervasive silica cement filling pore-space in intraclastic-limestone sample. e) Photomicrograph of skeletal grains replaced by different types of microquartz.

Mixed siliciclastic and carbonate sedimentation within ...

These lithologies are interpreted as slope and basinal units deposited in water depths that may have exceeded 250--300 m. Intraclastic limestone debris flow deposits and skeletal and oolitic calcarenite turbidites indicate that nearly all carbonate is allochthonous, derived from up-slope and platform shallow-water environments.

Geolex — MasonCity publications

 · Is dominated by skeletal limestone and dolomitic limestone (calcilutite and calcarenite), partly argillaceous. ... Becomes more dolomitic to west where it includes interbeds of "birdseye"-bearing intraclastic and laminated carbonates. Ranges from 6-11 m thick over most of its extent, but thins to 1.5 m in southernmost part. ...

BLAKE-BAHAMA BASIN, WESTERN NORTH ATLANTIC1

The chalks, including the distinctive intraclastic chalks, and skeletal packstones were deposited by turbidity currents, and less so by debris flows. These gravity flows eroded and entrained large numbers of siliceous mud and clay intraclasts, as well as lithified chalk and limestone clasts, some of …

INTERPRETATION DESCRIPTION

INTRACLASTIC-PELODAL-SKELETALGRAINSTONE ALGAL-SKELETALPACKSTONEANDWACKESTONE PELOIDAL-SKELETALPACKSTONE PELOIDAL-INTRACLASTIC-ALGAL PACKSTONE INTRACLASTIC-PELOIDAL-SKELETAL WACKESTONE P.anserinus 68m 90m P.serra e.robustus subzone P.serra ... Limestone Mosheim Member …

ABSTRACT: Lowstand Carbonate Reservoirs: Upper ...

These deposits are represented by porous reefs, skeletal sandstones, and porous-to-tight intraclastic limestones previously referred to as satellite or pinnacle reefs. These deposits, subsequently onlapped and buried by deep-water shales, comprise potentially prolific stratigraphic-trap reservoirs in basinal areas seaward of the Horseshoe Atoll.

Geologic units in Iowa (state in United States)

Interval includes Sweetland Creek Shale in southeast Iowa, and "Amana beds" of Iowa County. Lime Creek Fm onlaps eroded Ordovician surface in northwestern Iowa. Primary Lithologies: shale, gray to green-gray, dolomitic to calcareous; limestone, variably argillaceous, fossiliferous, part biostromal; dolomite, variably argillaceous, part ...

Texas Bureau of Economic Geology: Guide to the Permian ...

 · Top of Lamar Limestone Member. Stop 8 is at a resistant-weathering, thick, intraclastic packstone bed with large wackestone clasts and muddy skeletal matrix stratigraphically above the burrowed wackestone, about 30 m (100 ft) uptrail from switchback A (fig. 2). The packstone is interpreted to be another slope-derived, debris-flow deposit.

Analysis of Protoconites minor

Bed 2 is 2.6 m thick and consists of siliceous-phosphatic intraclastic dolostones bearing shelly fossils from the Anabarites trisulcatus-Protohertzina anabarica Assemblage Zone (Guo et al., 2014), in addition to the tubular taxon Megathrix longus (Shang et al., 2016). Bed 3 is about 18.5 m thick and consists of grey-black limestone interbedded ...

A revised Mississippian lithostratigraphy of County Galway ...

 · Ballymore Limestone (Early Viséan) Mostly fine-grained, dark grey well-bedded argillaceous limestone alternating with light grey coarse-grained limestone; shale interbeds; frequent coral colonies: Mainly poorly sorted skeletal wackestone/packstone with well-sorted intraclastic skeletal …

Carbonates & Other Rocks

Carbonate Rocks. The carbonate rocks make up 10 to 15% of sedimentary rocks. They largely consist of two types of rocks. Limestones which are composed mostly of calcite (CaCO 3) or high Mg calcite [(Ca,Mg)CO 3], and . Dolostones which are composed mostly of dolomite [CaMg(CO 3) 2]. Because carbonate minerals in general are soluble in slightly acidic waters, they often have high porosity and ...

Ribbon rocks revisited: the upper Cambrian (Furongian ...

 · Cg bioclastic–intraclastic packstone-to-conglomerate, Lm lime mudstone, Sg normally graded calcarenite to shale, Sl parallel-laminated shale, WP wackestone-to-packstone. Yellow: shale, brown: lime mudstone, blue: skeletal grainstone, grey: limestone conglomerate. S shale, M lime mudstone, W wackestone, P packstone, G grainstone, C conglomerate

Characteristics and evolution of pore types in marine ...

Isolated OM-hosted pores were found. In LFH3 lithofacies, skeletal and intraclastic molds are filled with OM. OM-hosted pores (a few microns size) that are well-connected are observed (Fig. 17G-L, 19 B). The central parts of these molds are highly porous to the rims.

Geologic Investigations No. 7 CORE PHOTOS PAY ZONE

Dolomitic limestone; wackestone texture (mud dominated with less than 50% grains); few skeletal grains and disturbed bedding interpreted to be subtidal deposits burrowed by sediment dwelling organisms Porosity appears to result from dolomitization of limestone and minor dissolution of …

Bioclast

Bioclasts are skeletal fossil fragments of once living marine or land organisms that are found in sedimentary rocks laid down in a marine environment—especially limestone varieties around the globe. some of which take on distinct textures and coloration from their predominate bioclasts—that geologists, archaeologists and paleontologists use to date a rock strata to a particular geological era.

PULCHRILAMINA, A NEW MOUND-BUILDING ORGANISM FROM

Oklahoma the mound rock is a muddy limestone, that is classified either as a boundstone or a mud-supported intraclastic skeletal wackestone. Calcarenite-filled channels are lacking on the Arbuckle mounds, although calcarenites are an integral part of the well-stratified limestone sequence that encloses the mounds (Text-fig. 2).

Geology of Organ Mountains and southern San Andres ...

intraclastic, uneven porcellenite, calcitic, fissile intraclastíc. disturbed. skel. slightly sandy porcellanite. fissile skel. frag., Sand stringers 250 2400 230 E 2200 2100 200 c 19 180 - Capallero 5,000'' 4.000'' 3,000'' 2,000'' NORTH Kds / Ttrb NORTH intraclastic porcellanite, disturbed intraclastic sand stringers wavy bedding intractastic

Sequence stratigraphy of the Middle Cambrian Daegi ...

 · The sediments that comprise the Middle Cambrian Daegi Formation in eastern central Korea are interpreted to have been deposited in a carbonate ramp setting. The Daegi Formation consists of nine lithofacies; argillaceous rock, ribbon rock, oolitic limestone, skeletal limestone, microbial limestone, intraclastic limestone, micritic limestone, bioturbated limestone and crystalline limestone ...