Bacterial-Paleontological Study of Early Precambrian Weathering Crusts
نویسندگان
چکیده
منابع مشابه
Abiogenic, microbial and hybrid authigenic carbonate crusts: components of Precambrian stromatolites
Authigenic seafl oor carbonate crusts include fenestrate microbialite, thrombolite, and four types here designated: Fine-grained Crust, Sparry Crust, Hybrid Sparry Fine-grained Crust, and Sparry Crust plus Coarse Grains. Each of the latter four types includes at least some layered examples that have generally been regarded as stromatolites. Recognition and interpretation of these various deposi...
متن کاملStromatolite reef crusts, Early Cretaceous, Spain: bacterial origin of in situ-precipitated peloid microspar?
Peloidal crusts are significant components of Early Cretaceous (Aptian) reef carbonates in eastern Spain. The crusts form steep-sided laminated deposits on coral and other skeletal surfaces. Their microfabric consists almost entirely of silt-sized peloids in fenestral microspar matrix. This microfabric contrasts with more poorly sorted and generally finer grained detrital wackestone– packstone ...
متن کاملOrganic and inorganic compounds in limestone weathering crusts from cathedrals in southern and Western europe.
Limestone and weathering crusts have been studied at the major cathedrals of Sevilla, in southwestern Spain, and Mechelen, in northern Belgium. These cities have very different climatic and environmental conditions. The deterioration characteristics of the limestone in both localities have been compared. Detailed petrographical characterization was carried out for the different building stones,...
متن کاملEffect of lichen biological soil crusts on soil properties derived from early Holocene sandy sediments
Introduction: Biological soil crusts are a community of cyanobacteria, fungi, lichens, and mosses and play key roles in arid and semi-arid regions including carbon and nitrogen accumulation, soil fertility, dust capture, soil conservation and stability. Recent studies show that the formation of biological soil crusts on mobile dunes areas is extremely difficult due to low vegetation cover, st...
متن کاملEarly cenozoic glaciation, antarctic weathering, and seawater
Stable and radiogenic isotopic and sedimentological data from sub-Antarctic deep sea sediment cores reveal a temporal link between changes in seawater SrrSr ratios and major episodes of late Eocene–early Oligocene climate change. The SrrSr records show two major inflections, one at 38–39 Ma near the middlerlate Eocene boundary, followed by another at 33.4 Ma. Similarly, the oxygen isotope, ice-...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Earth Science Research
سال: 2012
ISSN: 1927-0550,1927-0542
DOI: 10.5539/esr.v1n2p163