نتایج جستجو برای: carbonate ramp environment

تعداد نتایج: 547091  

Journal: :Sedimentology 2021

Since their first occurrence in the late Cretaceous, seagrasses have played a major role carbonate production and sedimentation across shallow-water nearshore environments, sustaining prolific factory contributing to sediment accumulation through combination of baffling trapping effects. Most reported Palaeogene seagrass occurrences developed oligo−mesotrophic shallow warm-water habitats are ch...

Journal: :Journal of African Earth Sciences 2021

A sedimentological investigation of Miocene deposits at the periphery Zagros foreland basin , Kurdistan Region, NE Iraq, reveals a cyclical arrangement carbonate-evaporite ramp facies . The study aims to provide rare insight into lateral variability microfacies and environments such systems' inner shoreline Between 10 40 depositional cycles are preserved, separated by flooding surface, recordin...

2004
Jasenka SREMAC

Carbonate sediments have been deposited in oceans and seas from the Proterozoic up to the present day. Their palaeogeographic distribution, extent and composition changed substantially through time. Recent carbonate platforms are closely linked with reef constructions, but, during the past, non-reefal carbonate production played an important role in the periods of the depressed reef-growth (KIE...

2017
Zulfa Ali Al Disi Samir Jaoua Tomaso R. R. Bontognali Essam S. M. Attia Hamad A. Al Saad Al-Kuwari Nabil Zouari

Citation: Al Disi ZA, Jaoua S, Bontognali TRR, Attia ESM, Al-Kuwari HAAS and Zouari N (2017) Evidence of a Role for Aerobic Bacteria in High Magnesium Carbonate Formation in the Evaporitic Environment of Dohat Faishakh Sabkha in Qatar. Front. Environ. Sci. 5:1. doi: 10.3389/fenvs.2017.00001 Evidence of a Role for Aerobic Bacteria in High Magnesium Carbonate Formation in the Evaporitic Environme...

2017
Zuozhen Han Dan Li HuaXiao Yan Peiyuan Li

High salt environment was widespread in modern and geological record, and sedimentation induced by microbes in these systems was an important part of sedimentary minerals and rocks. The mechanism of microbiologically induced carbonate precipitation has not been solved thoroughly although numerous scholars and experts have made specifically research of the problems with respect to minerals induc...

Journal: :Precambrian Research 2021

Records of shallow-marine ramps with the mixing carbonate and siliciclastic sediments are common throughout geological time. All these records have pure deposits as end members, occurring contemporaneously in distinct depositional regions along ramp, transitional hybrid facies between them. The two member can mix different scales alternate time due to climatic changes regressions transgressions...

This paper aims to evaluate and compare the effects of different methods of ramp metering on the operational conditions of traffic flow at three levels: the network level (including the freeway and its connected ramps), the entrance ramp, and the upstream segment of the entrance. To achieve this aim, one of the most important urban freeways in the metropolis of Isfahan was selected. The traffic...

Journal: :Journal of African Earth Sciences 2021

This paper concerns the sedimentary successions deposited in Mandawa Basin after separation of East and West Gondwana during subsequent southwards drift Madagascar Late Jurassic to Early Cretaceous times. The aim this study was provide more specific details on sedimentation report mineralogical petrographical characteristics less well documented successions, namely Kipatimu, Mitole Nalwehe form...

Journal: :The Journal of pharmacology and experimental therapeutics 2000
N Tilakaratne G Christopoulos E T Zumpe S M Foord P M Sexton

Receptor activity modifying proteins (RAMPs) constitute a group of three proteins, designated as RAMP1, 2, and 3, which are able to effect functional changes in some members of the G protein-coupled receptor family. Thus, RAMP1 or RAMP3 can modify the calcitonin receptor (CTR) to also function as a high-affinity amylin receptor-like phenotype. To examine the RAMP/CTR interaction, individual RAM...

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