Results 81 to 90 of about 35,817 (223)

Badlands and environmental change [PDF]

open access: yesGeographica Helvetica
Badlands develop in many climatic regions, on a wide range of soils and in various bedrock types. The physical triggers for development of badlands can be natural, such are tectonic activity and climate change, but more frequently they are human induced,
M. Kasanin-Grubin
doaj   +1 more source

The role of biofilms in subsurface transport processes [PDF]

open access: yes, 2010
Landfill and radioactive waste disposal risk assessments focus on contaminant transport and are principally concerned with understanding the movement of gas, water and solutes through engineered barriers and natural groundwater systems.
Bateman, K.   +6 more
core   +1 more source

Climate conditions on the South‐Iberian Palaeomargin during the latest Pliensbachian to early Toarcian: A mineralogical and geochemical study from hemipelagic deposits

open access: yesSedimentology, EarlyView.
ABSTRACT The integrated analysis of lithofacies, mineralogy and geochemistry of the hemipelagic marine succession exposed in La Cerradura section (South‐Iberian Palaeomargin) provides new information to characterise the palaeoenvironmental conditions during the latest Pliensbachian to early Toarcian, including the Jenkyns Event.
Chaima Ayadi   +4 more
wiley   +1 more source

Mineralogically based geology and stratigraphy of the Posyet Peninsular (Southern Primorye)

open access: yesВестник Камчатской региональной ассоциации "Учебно-научный центр". Серия: Науки о Земле, 2019
Authigenic minerals were studied in volcanogenic-sedimentary rocks of the Posyet Peninsular (Southern Primorye). They are sensitive indicators of sedimentation conditions, and indicate changes in the paleogeographic environment and the nature of ...
Можеровский А.В.
doaj   +1 more source

Partially-observed models for classifying minerals on Mars [PDF]

open access: yes, 2013
The identification of phyllosilicates by NASA's CRISM (Compact Reconnaissance Imaging Spectrometer for Mars) strongly suggests the presence of water-related geological processes.
Dundar, Murat, Li, Lin, Rajwa, Bartek
core   +1 more source

Evaluation of mineralogy per geological layers by Approximate Bayesian Computation

open access: yes, 2019
We propose a new methodology to perform mineralogic inversion from wellbore logs based on a Bayesian linear regression model. Our method essentially relies on three steps.
Bruned, Vianney   +3 more
core   +3 more sources

Progressively Fenitised Schist and Carbonatitic Clasts From a Metasomatic Aureole Beneath the Alkalic Dunedin Volcano, Otago, New Zealand

open access: yesNew Zealand Journal of Geology and Geophysics, Volume 69, Issue 2, June 2026.
Clasts of albite‐porphyroblastic quartzofeldspathic schist, derived from the Otago Schist basement, occur within the Port Chalmers Breccia, a diatreme at the centre of the Dunedin stratovolcano, New Zealand. Schists have undergone varying degrees of replacement reactions (at temperatures of 300° to >500°C) producing hornfelses, with Ca‐ and K‐enriched ...
Alan F. Cooper
wiley   +1 more source

SİVRİHİSAR KUZEY DOĞUSUNDAKİ (MÜLK-DEMİRCİ) NEOJEN YAŞLI VOLKANİKLERDE KİL MİNERALLEŞMESİ

open access: yesBulletin of the Mineral Research and Exploration, 2007
Mülk-Demirci yöresinde (KD Sivrihisar) yer alan Neojen yaşlı gölsel birimler; kırıntılı-evaporitik çökeller ile volkanik ve piroklastiklerden oluşmaktadır.
Zehra KARAKAŞ   +2 more
doaj  

Clay minerals in South Australian Holocene basaltic volcanogenic soils and implications for halloysite genesis and structure [PDF]

open access: yes, 2014
The clay mineralogical composition was determined of 8 soils formed from pyroclastic ejecta (tephra) from adjacent 5000-year old basaltic volcanoes at Mounts Gambier and Schank in South Australia.
Churchman, G. Jock, Lowe, David J.
core   +1 more source

Gully erosion in India: Geo‐environmental controls and region‐specific characteristics

open access: yesGeographical Research, Volume 64, Issue 2, May 2026.
Spatial statistical analyses using a novel spatial database of India‧s gully erosion landforms revealed that India has six major gullying‐affected regions, three of which (EU, DU, and KCH) are dominated by gully systems (gully networks), with badlands (vast intensely gullied landscapes) being predominant in the other three regions (YB, GP, and RU ...
Anindya Majhi   +3 more
wiley   +1 more source

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