Sedimentary and Tectonic Controls on the Development of an Early Mississippian Carbonate Ramp, Sacramento Mountains Area, New Mexico

Ahr, Wayne M.

doi:10.2110/pec.89.44.0203

Cited by 29 publications

(21 citation statements)

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“…In the Puebla de Lillo area, TST is composed of carbonates showing small-scale mound geometries (Fig. 7b-d), which nucleated over discontinuous oolitic shoals, suggesting that these local highs may be sites appropriate for the initiation of growth (Ahr 1989;Samankassou 2001). Carbonate deposits are dominated by micritic and Donezella boundstones, grading laterally into beresellid baZestones, skeletal mudstones/wackestones, and crinoidal packstones/ grainstones.…”

Section: Sequence B (Vereian)mentioning

confidence: 99%

Transgressive–regressive sequence stratigraphy of Pennsylvanian Donezella bioherms in a foreland basin (Lena Group, Cantabrian Zone, NW Spain)

Corrochano

Barba

Colmenero

2011

Facies

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A well-preserved Pennsylvanian (early Moscovian) succession including Donezella mounds, which accumulated in a highly subsiding foreland basin (Cantabrian Zone, NW of Spain), is described and discussed. This succession has been interpreted as one 3rd-order sequence reaching a thickness up to 815 m and recording »2.3-My duration. It consists of four 4th-order transgressive-regressive (T-R) sequences (105-350 m thick and »0.6-My duration), each subdivided into several 5th-order (»70-ky duration) meter-scale cycles (23-m average thickness). Nearly all the Donezella mounds are present in the second and third 4th-order sequences deWned (Levinco Formation). They are up to »90 m in thickness and several hundreds of meters wide, showing lenticular to domal morphologies with steep slopes up to 35-40°. Bioherms are composed of micritic boundstones with heterogeneous microfabrics and a diverse biotic community, including the microproblematic Donezella, calcitornellid foraminifers, bryozoans, agglutinated worm tubes, crinoids, and calcareous algae (red Komia/Ungdarella, beresellids, dasycladaceans and phylloids). According to the biotic assemblage and sedimentological features, these Donezella-rich bioherms thrived in a relatively shallow and low-energy environment (below fair-weather wave-base), and resulted from the baZing and binding ability of Donezella and associated biota, and the in situ-precipitation of microbial micrite. The upward evolution of the succession mainly resulted from the interplay between high tectonic subsidence rates and high-frequency moderate-amplitude glacioeustatic sealevel changes. The mounds growth mainly occurred during the transgressive phase of the 3rd-order sequence (Vereian), whereas during the regressive phase (Kashirian), deltaic siliciclastics prograding westward gradually buried and prevented the buildup development.

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Section: Sequence B (Vereian)mentioning

confidence: 99%

Transgressive–regressive sequence stratigraphy of Pennsylvanian Donezella bioherms in a foreland basin (Lena Group, Cantabrian Zone, NW Spain)

Corrochano

Barba

Colmenero

2011

Facies

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“…In contrast to the typical early Mississippian (Late Tournaisian) Waulsortian mounds, which occur in deeper water settings, the younger buildups commonly occur at the margins of fault-bound blocks and in proximal ramp settings in moderately deep to shallow water; the level-bottom equivalents is grainy shallow-shelf facies with taxonomically diverse biota (Ahr 1989;Bridges et al 1995).…”

Section: Comparisonsmentioning

confidence: 99%

Microbial‐sponge and microbial‐metazoan buildups in the Late Viséan basin‐fill sequence of the Jerada Massif (Carboniferous, NE Morocco)

Aretz¹,

Herbig²

2008

Geological Journal

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Three distinctive Late Viséan buildup intervals are differentiated on the southern limb of the Jerada Synclinorium. The oldest buildups (BI-1) are preserved as olistoliths in the Oued El Koriche Formation (Fm). They were located on a southern platform prior to reworking. The younger Koudiat Es-Senn Fm contains two autochthonous buildup intervals (BI-2 to BI-3). BI-1 and BI-2 buildups are large microbial-sponge buildups, BI-3 are small microbial-metazoan buildups in the capping bed succession above BI-2. All buildups are characterized by a rigid non-skeletal microbial framework. Growth of the largest BI-2 buildups started in aphotic to dysphotic conditions in a water depth significantly less than 100 m and continued into agitated shallow-water. Smaller BI-2 buildups and all BI-3 buildups are encased in grainy shallow-water carbonates. In contrast to a mostly homogeneous microbial-sponge facies below, the uppermost part of the BI-2 buildups and all BI-3 buildups consist of heterogeneous boundstones with differing frame builders. BI-1 to BI-3 buildups represent different stages within a Viséan basin-fill sequence. Carbonate sedimentation ended with the deposition of peritidal oncolitic floatstones below the unconformably overlying Namurian shales. The Jerada buildups have many features commonly associated with 'reefs'. Comparison with contemporaneous buildups shows considerable similarities to buildups from Algeria, the Eastern Moroccan Anti-Atlas and the British Isles.

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“…5). Following the early Carboniferous transgression, carbonate ramps dominated early Dinantian (Courceyan) depositional environments (Ahr 1989;Wright & Faulkner 1990;Wright 1994). Large Waulsortian buildup complexes developed on the distal parts of the ramps (Fig.…”

Section: Evolution Of Carboniferous Buildupsmentioning

confidence: 99%

Evidence for microbial influence on the development of Lower Carboniferous buildups

Pickard

1996

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Following a series of mass extinction events towards the end of the Devonian (Frasnian), true skeletal reef-building organisms were effectively lost from latest Devonian (Famennian) and Lower Carboniferous (Dinantian) marine ecosystems. Nevertheless, nonskeletal, mud-dominated buildups (mud-mounds) are common throughout this geological interval, and microbial activity (fungi, algae and/or bacteria) is considered to have played a significant role in the development of these buildups. Evidence of microbial activity in Dinantian buildups may be divided into two broad categories: (a) direct evidence, such as the development of stromatolitic and thrombolitic macrostructures, presence of cryptic incrustations and preservation of calcimicrobes such as Renalcis; (b) cryptic evidence, in the form of peloidal 'mud' which forms the matrix of many Dinantian buildups. The matrix peloidal micrites closely resemble modern microbially mediated (algal and bacterial) carbonate precipitates. Precipitation of the peloidal fabrics is considered to have occurred within a microbial mat that bound the accreting buildup surface, thereby allowing steep depositional slopes to develop in deep water buildups and protecting shallow water buildups from erosion. Extensive cavity systems, often developed in Dinantian buildups, may also contain stromatolitic mats and micritized cavity walls. These fabrics indicate the additional presence of internal heterotrophic microbial communities and suggest that a diverse range of microbes were present in Dinantian buildups.Controls on the development of Dinantian buildups are likely to have been multiple. Nutrient-rich (mesotrophic) water masses, in combination with relatively low sedimentation rates, may have promoted buildup initiation, while regional palaeogeography and tectonic events played a role in their location. Tournaisian buildups commonly developed in a wide range of water depths on carbonate ramps, whereas Vis6an buildups, particularly in northwestern Europe, were often restricted to relatively shallow water over tectonically controlled topographic highs.

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Sedimentary and Tectonic Controls on the Development of an Early Mississippian Carbonate Ramp, Sacramento Mountains Area, New Mexico

Cited by 29 publications

References 0 publications

Transgressive–regressive sequence stratigraphy of Pennsylvanian Donezella bioherms in a foreland basin (Lena Group, Cantabrian Zone, NW Spain)

Transgressive–regressive sequence stratigraphy of Pennsylvanian Donezella bioherms in a foreland basin (Lena Group, Cantabrian Zone, NW Spain)

Microbial‐sponge and microbial‐metazoan buildups in the Late Viséan basin‐fill sequence of the Jerada Massif (Carboniferous, NE Morocco)

Evidence for microbial influence on the development of Lower Carboniferous buildups

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