Results 51 to 60 of about 1,468 (200)

PALEOECOLOGY AND FUNCTIONAL MORPHOLOGY OF THE PERMIAN LYTTONIID BRACHIOPOD PIRGULIA

Rivista Italiana di Paleontologia e Stratigrafia, 2019
The lyttoniid brachiopods of the Permian exhibit a unique valve morphology: a branched lobate structure takes the form of the dorsal valve. In one group of lyttoniids, the genus Pirgulia, the ventral valve wraps around to form a cone that fully encloses ...
DANIEL STADTMAUER, SUSAN BUTTS
doaj   +1 more source

Komatiitic explosive volcanism and its tectonic setting in Finland, the Fennoscandian (Baltic) Shield [PDF]

Bulletin of the Geological Society of Finland, 1990
The variously explosive komatiitic volcanism in Finland was virtually confined to the Archaean continental segment, where it occurred in the Lapland and Kuhmo‒ Suomussalmi greenstone belts between 3.0 Ga and 2.5 Ga, in the continental borderland at 1.97 ...
M. Saverikko
doaj   +1 more source

Amphibole: A major carrier of helium isotopes in crustal rocks [PDF]

, 2016
The first evidence for a specific role of amphiboles in He isotope balance of crustal rocks was presented in early contributions by Gerling et al. (1971, 1976).
A.B. Verchovsky, Andrews, Ashkinadze, Baxter, Baxter, Baxter, Begemann, Belkov, Damon, Farley, Gaber, Gannibal, Gerling, Gerling, Gerling, Gerling, Gorshkov, Graham, Helz, Hilton, I.L. Kamensky, I.N. Tolstikhin, Jackson, Jackson, Jackson, Kalita, Kamensky, Kamensky, Kelley, Kendrick, Komarov, Komarov, Kremenetsky, Lee, Lee, Lee, Lee, Lippolt, M.A. Gannibal, Mamyrin, Martel, Matsumoto, Morozova, Morrison, Petrov, Pujol, S.V. Tarakanov, Scarsi, Shelby, Sherlock, Staudacher, Tolstikhin, Tolstikhin, Tolstikhin, Tolstikhin, Tolstikhin, Tolstikhin, Trull, V.I. Skiba, V.R. Vetrin, Verchovsky, Vetrin, Vetrin, Wartho, Wright, Wright   +65 more
core   +1 more source

GENETIC SOURCES AND TECTONOPHYSICAL REGULARITIES OF DIVISIBILITY OF THE LITHOSPHERE INTO BLOCKS OF VARIOUS RANKS AT DIFFERENT STAGES OF ITS FORMATION: TECTONOPHYSICAL ANALYSIS

Геодинамика и тектонофизика, 2015
The paper presents the first tectonophysical reconstruction of initial divisibility of the protolithosphere as a result of convection in the cooling primitive mantle. Initial division of the protolithosphere into separate masses, i.e.
Semen I. Sherman
doaj   +1 more source

Two episodes of subduction-related intrusive magmatism within the Pechora zone of the Pechora Basin basement

Vestnik of Geosciences, 2023
The Pechora Basin is the largest tectonic structure of the Pechora Plate. It is located between the Timan and the Cis-Ural Foredeep. The Upper Precambrian sedimentary-metamorphic and igneous rocks of the basement are completely overlain by a sedimentary ...
V. Andreichev, A. Soboleva, E. Dovzhikova, Y. Ronkin   +3 more
semanticscholar   +1 more source

Origin of the megabreccias in the Katanga Copperbelt (D.R.Congo)

, 2018
© 2018 Elsevier Ltd The megabreccias in the Katanga part of the Neoproterozoic Central African Copperbelt contain up to several km-long blocks and fragments of the Mines Subgroup which host most of the stratiform Cu-Co deposits.
Cailteux, Jacques LH, De Cuyper, Jana, De Putter, Thierry, Dewaele, Stijn, Muchez, Philippe   +4 more
core   +1 more source

Seismic velocity structure of the Guerrero gap, Mexico [PDF]

Geofísica Internacional, 2006
A two-dimensional velocity structure of the Guerrero gap was obtained by applying a damped least square method to hypocenters of local seismicity recorded by a telemetric network situated on the Guerrero coast, above Cocos plate subduction zone.
Diana Comte, Gerardo Suárez, Jaime Domínguez, Luis Quintanar   +3 more
doaj  

City-region or urban-rural framework: what matters more in understanding the residential location of the creative class? [PDF]

, 2019
This paper addresses the key question as to what matters more in understanding the residential location of the creative class in Slovenia: the city-region or the urban-rural framework?
Clifton, Nick, Kozina, Jani
core   +2 more sources

Speed structure of the mantle under the Dnieper-Donets Depression and its surroundings. Part I

Геофизический журнал, 2020
The article discusses the high-speed structure of the mantle under the Dnieper-Donets Depression (DDD). The solution obtained by the Taylor approximation of the solution of the three-dimensional seismic tomography problem is used.
T.A. Tsvetkova, I.V. Bugaenko, L.N. Zaets   +2 more
doaj   +1 more source

Mid-sized complex crater formation in mixed crystalline-sedimentary targets: Insight from modeling and observation

, 2008
Large impact crater formation is an important geologic process that is not fully understood. The current paradigm for impact crater formation is based on models and observations of impacts in homogeneous targets.
Amsden, Angenheister, Artemieva, Bottke, Collins, Collins, Collins, Collins, Dabija, Dietz, Dressler, Ernstson, Ernstson, Frisch, Gall, Gebhardt, Goldin, Gurov, Gurov, Gurov, Hajnal, Herrick, Hörz, Hüttner, Hüttner, Ivanov, Ivanov, Kenkmann, Kenkmann, Laurenzi, Layer, Lee, Melosh, Melosh, Melosh, Melosh, O'Keefe, O'Keefe, O'Keefe, Oberbeck, Oberbeck, Osinski, Osinski, Osinski, Osinski, Osinski, Osinski, Osinski, Pierazzo, Pierazzo, Pierazzo, Pohl, Pohl, Redeker, Scott, Senft, Senft, Sherlock, Shoemaker, Shuvalov, Shuvalov, Stöffler, Stöffler, Stöffler, Thompson, Thorsteinsson, Tsikalas, Wünnemann, Wünnemann, Wünnemann   +69 more
core   +1 more source