Results 131 to 140 of about 318,456 (400)
Ultramafic xenoliths from the Bearpaw Mountains, Montana, USA: evidence for multiple metasomatic events in the lithospheric mantle beneath the Wyoming craton [PDF]
, 2004 Ultramafic xenoliths in Eocene minettes of the Bearpaw Mountains volcanic field (Montana, USA), derived from the lower lithosphere of the Wyoming craton, can be divided based on textural criteria into tectonite and cumulate groups. The tectonites consist
Bodinier, J.L. +8 more
core +1 more source
The Depositional Record, EarlyView.Despite advanced wastewater treatment, dilution by rainwater and mixing, and microbial modification, nitrogen nutrients derived from shallowly injected wastewater are detected in nearshore waters in the Florida Keys. Abstract Injection of treated wastewater into the shallow subsurface on islands and along coastlines is a common practice in areas like ...
Miquela Ingalls +3 more
wiley +1 more source
MINERAL TRANSFORMATIONS OF HYALOCLASTITE DURING LITHOGENESIS IN MASSIVE SULFIDE BEARING REGIONS OF URALS [PDF]
Минералогия, 2015 The features of the submarine transformations from primary hyaloclastites to oxide-ferruginous rocks of the Urals massive sulfide deposits are identified. These processes are accompanied by formation of smectite and Si-Fe phases transformed into chlorite-
N.R. Ayupova +3 more
doaj
The oxygen isotopic composition of water extracted from unequilibrated ordinary chondrites [PDF]
, 2003 The oxygen isotopic composition of water extracted from the unequilibrated ordinary chondrites Semarkona and Bishunpur reveals differences in alteration mineralogy and levels of isotopic enrichment – reflecting key parameters in the alteration ...
Baker, L. +3 more
core
Mineralogical Characterization of Baptistina Asteroid Family: Implications for K/T Impactor Source
, 2011 Bottke et al. (2007) linked the catastrophic formation of Baptistina Asteroid Family (BAF) to the K/T impact event. This linkage was based on dynamical and compositional evidence, which suggested the impactor had a composition similar to CM2 carbonaceous
Candal, Alvaro Alvarez +10 more
core +1 more source
The Depositional Record, EarlyView.Halite thickness in Mbr 2 of the Kumugeliemu can reach 1000 m. The thick halite is associated with sedimentary rock with shallow water fabrics. The thick halite was formed in a shallow‐sea water environment. The ‘Multiple transgression‐salt‐forming’ model was established.
Peng Qin, Dakang Zhong, Zhonggui Hu
wiley +1 more source
Dust-grain processing in circumbinary discs around evolved binaries. The RV Tauri spectral twins RU Cen and AC Her [PDF]
, 2007 Context: We study the structure and evolution of circumstellar discs around evolved binaries and their impact on the evolution of the central system. Aims: To study in detail the binary nature of RUCen and ACHer, as well as the structure and mineralogy ...
Dominik, C. +4 more
core +5 more sources
Clay mineralogy and shale instability: an alternative conceptual analysis
Clay minerals, 2014 The instability of shales in drilled formations leads to serious operational problems with major economic consequences for petroleum exploration and production.
M. J. Wilson, L. Wilson
semanticscholar +1 more source
The Depositional Record, EarlyView.A 30 m long sedimentary succession at the bottom of the Belize Blue Hole represents terrestrial cenote (12.5–7.2 ka BP), restricted marine swamp (7.2–5.7 ka BP) and fully marine lagoonal phases (5.7–0 ka BP) on Lighthouse Reef carbonate platform. Post‐glacial and Holocene sea‐level rise largely controlled the sedimentological, faunal and floral changes
Eberhard Gischler +12 more
wiley +1 more source