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all geography including DSDP/ODP Sites and Legs
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Arctic region
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Skaergaard Intrusion (1)
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Asia
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Primary terms
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Arctic region
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Greenland
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Skaergaard Intrusion (1)
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Asia
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Far East
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Japan (1)
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associations (1)
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Atlantic Ocean
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Mid-Atlantic Ridge (2)
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bacteria
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Bacillus
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Bacillus subtilis (1)
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Canada
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Arctic Archipelago (1)
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Eastern Canada
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James Bay Lowlands (1)
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Ontario
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Algoma District Ontario
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Elliot Lake Ontario (2)
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Michipicoten Island (1)
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Moose River basin (1)
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Nunavut
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Ellesmere Island (1)
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Queen Elizabeth Islands
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Ellesmere Island (1)
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Western Canada
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British Columbia (1)
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Northwest Territories (2)
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Cenozoic
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Quaternary
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Holocene (2)
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chemical analysis (1)
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clay mineralogy (5)
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crystal growth (3)
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crystal structure (2)
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crystallography (1)
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Deep Sea Drilling Project
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Leg 37
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DSDP Site 335 (2)
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diagenesis (4)
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electron microscopy (1)
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geochemistry (13)
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hydrogeology (1)
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igneous rocks
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volcanic rocks
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basalts (1)
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glasses
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palagonite (2)
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volcanic glass (1)
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lichens (1)
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Mesozoic
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Cretaceous (1)
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metal ores
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gold ores (1)
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iron ores (1)
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rare earth deposits (1)
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uranium ores (1)
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metals
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actinides
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thorium (1)
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uranium (1)
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alkaline earth metals
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radium (1)
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metamorphic rocks (2)
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metamorphism (3)
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North America
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soils (1)
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South America
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Brazil
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spectroscopy (1)
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thallophytes (4)
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weathering (1)
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sedimentary rocks
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sedimentary rocks
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bauxite (1)
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coal
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bituminous coal (1)
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lignite (1)
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sediments
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sediments
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clastic sediments
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sand (1)
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soils
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soils (1)
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GeoRef Categories
Era and Period
Epoch and Age
Book Series
Date
Availability
Iron phosphate precipitation by epilithic microbial biofilms in Arctic Canada Free
Metal sorption and mineral precipitation by bacteria in two Amazonian river systems: Rio Solimões and Rio Negro, Brazil Available to Purchase
The structural characteristics of palagonite from DSDP Site 335 Available to Purchase
Prolific organic SiO 2 precipitation in a solute-deficient river: Rio Negro, Brazil Available to Purchase
Wet-to-dry transition of smectite as revealed by humidity-controlled electron microscopy Available to Purchase
Metal uptake and Fe-, Ti-oxide biomineralization by acidophilic microorganisms in mine-waste environments, Elliot Lake, Canada Free
Palagonitization of basaltic glass from DSDP Site 335, Leg 37; textures, chemical composition, and mechanism of formation Available to Purchase
Growth of clay minerals in natural and synthetic glasses Available to Purchase
Clay-organic complexes as a cementing agent in the Arahama sand dune, Japan Available to Purchase
Precambrian glass Available to Purchase
Metallic ion binding by Bacillus subtilis: Implications for the fossilization of microorganisms Available to Purchase
Geochemistry of two Cretaceous coal-bearing sequences: James Bay lowlands, northern Ontario, and Peace River basin, northeast British Columbia Free
Primitive clay precursors formed on feldspar Free
Metal fixation by bacterial cell walls Free
Uranium uptake by algae: experimental and natural environments Free
Formation of Primitive Clay Precursors on K-Feldspar Under Extreme Leaching Conditions Available to Purchase
Abstract Perthitic K-feldspar in Brazilian alkaline rocks covered with a thick weathering rind shows evidence for the formation of iron-rich transitional precursors of clay minerals. High-resolution transmission electron microscopy, energy dispersive X-ray analyses (EDX), and electron diffraction patterns clearly show the decomposition of K-feldspar and growth of these transitional products. They occur as long, curled fiber forms or circular forms on the altered feldspar surface. The electron diffraction patterns show diffuse rings at 4.41, 2.65, 1.56, and 1.38 Å, suggesting poor crystallinity or random orientation. These circular structures, typically 150–200 Å in diameter, contain duplicate to quintuplicate 7-, 14-, and 20-Å lattice images. Step scanning EDX analysis shows that the concentrations of Si, Al, and K tend to decrease and Fe increase from unaltered parts to altered parts of the clay precursors. Crystalline halloysite(7Å) appears to form from them.