Results 71 to 80 of about 139,956 (281)
Geosciences, 2020 Quartzites and paragneisses of the Archean granulite series of the Anabar Shield (Siberian Craton, Russia) are described geochemically. The Sm-Nd isotope systematics of the rocks and the U-Pb age (SHRIMP II) and geochemistry of zircons from quartzites ...
Nikolay I. Gusev +2 more
doaj +1 more source
Challenges of identifying putative planetary-origin meteorites composed of non-igneous material [PDF]
arXiv, 2018 This concept article discusses the challenges of identifying planetary-origin meteorites of non-igneous composition, primarily of sedimentary origin, distinct from SNC meteorites. The paper reviews evidence on putative sedimentary-origin meteorites and potential parent bodies for sedimentary meteorites.
arxiv
STONE 6: Artificial Sedimentary Meteorites in Space [PDF]
, 2008 The STONE 6 experiment demonstrated the survivability of carbonaceous and microfossiliferous martian analogue sediments during atmospheric re-entry.
Brack, A. +10 more
core
Journal of MMIJ, 2017 It is of significant importance to safely isolate the radioactive wastes from the human environments. Entombment of the wastes in deep subsurface may be a plausible solution on this issue, and will be adopted in the countries where the nuclear power ...
Naoki KINOSHITA, Hideaki YASUHARA
doaj +1 more source
Ellipsoidal anisotropy in elasticity for rocks and rock masses [PDF]
arXiv, 2011 One of the interesting features with the ellipsoidal models of anisotropy presented in this paper is their acceptance of analytical solutions for some of the basic elasticity problems. It was shown by Pouya (2000) and Pouya and Zaoui (2006) that many closed-form solutions for basic problems involving linear isotropic materials could be extended by ...
arxiv
Petrography of Sandstone Units of Injana Formation in Al-Teeb Area South Eastern Iraq
Academic Science JournalThe present study deals with study the sandstone units of injana formation in Alteeb area, east of Missan governorate southeastern Iraq. Ten samples of these sandstone were collected in order thin sectined for petrogtaphic decribtion. these sandstone are
Hasan Kattoof Jasim, Maysoon Omer Ali
doaj +1 more source
Rudarsko-geološko-naftni Zbornik, 2018 Determining geomechanical characteristics of rocks plays a significant role in all consequent designing stages of geosciences. On the other hand, drilling is one of the considerable operations in primer phases of extracting rocks.
Mojtaba Yari, Raheb Bagherpour
doaj +1 more source
An evaluation of multiband photography for rock discrimination [PDF]
The author has identified the following significant results. With the advent of ERTS and Skylab satellites, multiband imagery and photography have become readily available to geologists.
Lee, K., Raines, G. L.
core +1 more source
Growing Pebbles and Conceptual Prisms - Understanding The Source of Student Misconceptions About Rock Formation [PDF]
, 2007 Provides pedagogical insight concerning learners' pre-conceptions and misconceptions about the rock cycle The resource being annotated is: http://www.dlese.org/dds/catalog_NASA-Edmall-535 ...
Lamont-Doherty Earth Observatory, Columbia University
core
Discriminating cool-water from warm-water carbonates and their diagenetic environments using element geochemistry: the Oligocene Tikorangi Formation (Taranaki Basin) and the dolomite effect [PDF]
, 2004 Fields portrayed within bivariate element plots have been used to distinguish between carbonates formed in warm- (tropical) water and cool- (temperate) water depositional settings.
Al‐Aasm I. S. +14 more
core +2 more sources