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... Mantle sequences include tectonized harzburgite and rare ultramafic–mafic cumulates as well as isotropic gabbro lenses and isolated dykes within the harzburgite. Crustal sequences include rare gabbros (mostly in IB ophiolites), sheeted dyke complexes, pillowed lavas and felsic rocks. All Zagros ophi ...
... Mantle sequences include tectonized harzburgite and rare ultramafic–mafic cumulates as well as isotropic gabbro lenses and isolated dykes within the harzburgite. Crustal sequences include rare gabbros (mostly in IB ophiolites), sheeted dyke complexes, pillowed lavas and felsic rocks. All Zagros ophi ...
Summary of Northeast Asia geodynamics and tectonics*
... summary geodynamics map of the region, and also provides a general introduction for readers who are unfamiliar with Northeast Asia. For this analysis, the region of ...
... summary geodynamics map of the region, and also provides a general introduction for readers who are unfamiliar with Northeast Asia. For this analysis, the region of ...
Makhtesh Ramon Geological Window, hyper
... basanite - a basic volcanic rock of the basalt group, and north of it are outcrops of a brownish volcanic tuff. Thus, we are dealing with a rather well defined volcano with relicts of a crater at its center. The basanite has been dated to be around 100 to 120 million years old - in good accordance w ...
... basanite - a basic volcanic rock of the basalt group, and north of it are outcrops of a brownish volcanic tuff. Thus, we are dealing with a rather well defined volcano with relicts of a crater at its center. The basanite has been dated to be around 100 to 120 million years old - in good accordance w ...
preview PDF only - California State University Stanislaus
... in 1985 and provided to the University of Texas at Austin for research purposes in 2002. We correlate regional and continuous aeromagnetic features with a compilation of geologic data to reveal the extent, structural grain, and inferred boundaries of tectonic terranes that compose the remote and und ...
... in 1985 and provided to the University of Texas at Austin for research purposes in 2002. We correlate regional and continuous aeromagnetic features with a compilation of geologic data to reveal the extent, structural grain, and inferred boundaries of tectonic terranes that compose the remote and und ...
1.8 Billion Years of Detrital Zircon Recycling Calibrates a
... Detrital zircon provenance studies from the main siliciclastic successions of the northern Cordillera propose multiple stages of regional sedimentary recycling interspersed with influx of sediment from arcs coupled with exotic crustal sources (Table 1). Orogenic events result in detrital zircon popu ...
... Detrital zircon provenance studies from the main siliciclastic successions of the northern Cordillera propose multiple stages of regional sedimentary recycling interspersed with influx of sediment from arcs coupled with exotic crustal sources (Table 1). Orogenic events result in detrital zircon popu ...
Article
... Detrital zircon provenance studies from the main siliciclastic successions of the northern Cordillera propose multiple stages of regional sedimentary recycling interspersed with influx of sediment from arcs coupled with exotic crustal sources (Table 1). Orogenic events result in detrital zircon popu ...
... Detrital zircon provenance studies from the main siliciclastic successions of the northern Cordillera propose multiple stages of regional sedimentary recycling interspersed with influx of sediment from arcs coupled with exotic crustal sources (Table 1). Orogenic events result in detrital zircon popu ...
Thematic Article Tethyan ophiolites and Pangea break-up
... 1978; Manspeizer 1988). Different types of Middle Triassic–Early Jurassic rifting magmatism and their distribution in the Atlantic Morocco margin are shown in Figure 7. ...
... 1978; Manspeizer 1988). Different types of Middle Triassic–Early Jurassic rifting magmatism and their distribution in the Atlantic Morocco margin are shown in Figure 7. ...
The Cretaceous and Cenozoic tectonic evolution of
... central ophiolite belt on New Guinea (Fig. 1b), likely preserved in an embayment along New Guinea (Hill and Hall, 2003). The lack of preserved seafloor spreading histories results in uncertain placements and tectonic reconstructions of many terranes presently found in Southeast Asia. As a result, we ...
... central ophiolite belt on New Guinea (Fig. 1b), likely preserved in an embayment along New Guinea (Hill and Hall, 2003). The lack of preserved seafloor spreading histories results in uncertain placements and tectonic reconstructions of many terranes presently found in Southeast Asia. As a result, we ...
Wadhwan Formation of Western India
... in a tectonically active rift, presence of high gradient JuLy 1996 ...
... in a tectonically active rift, presence of high gradient JuLy 1996 ...
DOC - Offshore Petroleum Exploration Acreage Release
... petroleum exploration wells have been drilled (Figure 2). With the exception of Gnarlyknots 1/1A, all wells have been drilled in relatively shallow water near the basin margin and the deeper part of the sub-basin remains largely untested. No hydrocarbons have been discovered in the Bight Basin and t ...
... petroleum exploration wells have been drilled (Figure 2). With the exception of Gnarlyknots 1/1A, all wells have been drilled in relatively shallow water near the basin margin and the deeper part of the sub-basin remains largely untested. No hydrocarbons have been discovered in the Bight Basin and t ...
New Mexico Geological Society
... The granitic-clast lithofacies is restricted to the most northeastern section of the main outcrop area and scattered exposures of Glance Conglomerate further north. This facies rests either on the mixed-clast facies or unconformably on Precambrian granitic rocks. The lower part of this unit, where i ...
... The granitic-clast lithofacies is restricted to the most northeastern section of the main outcrop area and scattered exposures of Glance Conglomerate further north. This facies rests either on the mixed-clast facies or unconformably on Precambrian granitic rocks. The lower part of this unit, where i ...
Facies analysis and depositional environments of the Upper
... which crop out widely in the Nakhlak area of central Iran, consist of conglomerates, sandy limestones and dolostones, calcareous sandstones, sandy-argillaceous limestones and reefal limestones. The lower boundary of the studied section is an angular unconformity and its upper boundary is faulted. Se ...
... which crop out widely in the Nakhlak area of central Iran, consist of conglomerates, sandy limestones and dolostones, calcareous sandstones, sandy-argillaceous limestones and reefal limestones. The lower boundary of the studied section is an angular unconformity and its upper boundary is faulted. Se ...
Field Trip Guide to the Upper Cretaceous Hornbrook Formation and
... few meters. Sandstones in this exposure contain abundant molluscan megafossils and trace fossils; megafossils yield an age of Cenomanian to early Coniacian (Sliter et al, 1984). Sandstones also exhibit planar stratification, hummocky cross-stratification, and most beds are normally graded. The Osbur ...
... few meters. Sandstones in this exposure contain abundant molluscan megafossils and trace fossils; megafossils yield an age of Cenomanian to early Coniacian (Sliter et al, 1984). Sandstones also exhibit planar stratification, hummocky cross-stratification, and most beds are normally graded. The Osbur ...
An International Journal of CHAPTER 1 The Island of Elba: tectonic
... is the Upper Oligocene/Lower Miocene, due to the presence of Macigno sandstones (in Complex Ill) and Pseudomacigno (Complex II) in the footwall of thrust contacts that have ophiolites in the hangingwall. As collision progressed the wedge started to be shortened to the point that not only internal th ...
... is the Upper Oligocene/Lower Miocene, due to the presence of Macigno sandstones (in Complex Ill) and Pseudomacigno (Complex II) in the footwall of thrust contacts that have ophiolites in the hangingwall. As collision progressed the wedge started to be shortened to the point that not only internal th ...
DNR San Juan Islands Brandon
... Middle Jurassic se¬quence of volcanic rocks with subordinate limestone and epiclastic sediments. Units within this terrane are ex¬amined at Stops 2-7 and 2-8 (Haugerud, this volume). The Chilliwack terrane is commonly correlated with arc-volcanic rocks in the eastern Klamath Mountains and eastern Si ...
... Middle Jurassic se¬quence of volcanic rocks with subordinate limestone and epiclastic sediments. Units within this terrane are ex¬amined at Stops 2-7 and 2-8 (Haugerud, this volume). The Chilliwack terrane is commonly correlated with arc-volcanic rocks in the eastern Klamath Mountains and eastern Si ...
Accreted oceanic terranes in Ecuador: Southern edge of the
... magmatic basement has been made by Mamberti et al. (2003). Besides the hyaloclastites, pillow basalts, dolerites and gabbros that are common to all magmatic basement units, the Guaranda terrane is marked by the frequent occurrence of high-Mg basalts, ankaramites (8-17% MgO) with large clinopyroxene ...
... magmatic basement has been made by Mamberti et al. (2003). Besides the hyaloclastites, pillow basalts, dolerites and gabbros that are common to all magmatic basement units, the Guaranda terrane is marked by the frequent occurrence of high-Mg basalts, ankaramites (8-17% MgO) with large clinopyroxene ...
Regional Geology of the Bight Basin
... and nature of the sedimentary section. The anomalously thick nature of the sub-basin may indicate, however, that Jurassic–Lower Cretaceous rifts are present at depth. The Early Cretaceous was characterised by post-rift thermal subsidence in the Bight Basin (Figure 3). By the mid-Cretaceous, open oce ...
... and nature of the sedimentary section. The anomalously thick nature of the sub-basin may indicate, however, that Jurassic–Lower Cretaceous rifts are present at depth. The Early Cretaceous was characterised by post-rift thermal subsidence in the Bight Basin (Figure 3). By the mid-Cretaceous, open oce ...
ch13 - earthjay science
... Mesozoic began after the extinction of Paleozoic organisms. Mesozoic rocks contain the remains of organisms that are more advanced than those of Paleozoic, but not as modern as those living today. Two new vertebrate classes appeared: birds and mammals. Mesozoic lasted approximately 186 million years ...
... Mesozoic began after the extinction of Paleozoic organisms. Mesozoic rocks contain the remains of organisms that are more advanced than those of Paleozoic, but not as modern as those living today. Two new vertebrate classes appeared: birds and mammals. Mesozoic lasted approximately 186 million years ...
Hydrocarbon basins in SE Asia: understanding why they are there
... ABSTRACT: There are numerous hydrocarbon-rich sedimentary basins in Indonesia, Malaysia and southern Thailand. Almost all these basins began to form in the Early Cenozoic, they are filled with Cenozoic sediments, most are rifted basins that are the product of regional extension, and they formed main ...
... ABSTRACT: There are numerous hydrocarbon-rich sedimentary basins in Indonesia, Malaysia and southern Thailand. Almost all these basins began to form in the Early Cenozoic, they are filled with Cenozoic sediments, most are rifted basins that are the product of regional extension, and they formed main ...
Evidence for Early Cretaceous oceanic crust trapped in the
... Ar/39 Ar dates. These new 40 Ar/39 Ar ages on two gabbro sites dredged in the Huatung Basin indicate the existence of Early Cretaceous oceanic crust east of Taiwan. The di¡erent amphibole age spectra are partially discordant, probably as a result of some hydrothermal alteration on the oceanic £oor. ...
... Ar/39 Ar dates. These new 40 Ar/39 Ar ages on two gabbro sites dredged in the Huatung Basin indicate the existence of Early Cretaceous oceanic crust east of Taiwan. The di¡erent amphibole age spectra are partially discordant, probably as a result of some hydrothermal alteration on the oceanic £oor. ...
Colon fold belt of Honduras - California State University Stanislaus
... Society of America Special Paper 428, p. 129–149, doi: 10.1130/2007.2428(06). For permission to copy, contact [email protected]. ©2007 The Geological Society of America. All rights reserved. ...
... Society of America Special Paper 428, p. 129–149, doi: 10.1130/2007.2428(06). For permission to copy, contact [email protected]. ©2007 The Geological Society of America. All rights reserved. ...
Cuban Geology - Red Cubana de la Ciencia
... To the SW of the Bahamian Cretaceous Platform edge are the slope deposits of the Camajuani Belt (Figs. 2 and 3). In Central Cuba, Kimmeridgian shallow-water limestones have tentatively been identified (Pardo, 1975), but westward (in Matanzas province), deep-water equivalents are well known in explor ...
... To the SW of the Bahamian Cretaceous Platform edge are the slope deposits of the Camajuani Belt (Figs. 2 and 3). In Central Cuba, Kimmeridgian shallow-water limestones have tentatively been identified (Pardo, 1975), but westward (in Matanzas province), deep-water equivalents are well known in explor ...
profiles
... • Snowball Earth • Animals of the Vendian EARLY PALEOZOIC ERA ....................................................................................16 • Paleozoic era • Land animals • Cambrian • Ordovician • Silurian ...
... • Snowball Earth • Animals of the Vendian EARLY PALEOZOIC ERA ....................................................................................16 • Paleozoic era • Land animals • Cambrian • Ordovician • Silurian ...
Petroleum Prospects of Lamu Basin, South
... temperature index determinations for coastal wells indicate that the oil window is generally located at depths greater than 3000 m, due to the low geothermal gradient associated with the great sediment thickness in this part of the Lamu basin (Rop, 2003; NOCK, 1995). The present day knowledge indica ...
... temperature index determinations for coastal wells indicate that the oil window is generally located at depths greater than 3000 m, due to the low geothermal gradient associated with the great sediment thickness in this part of the Lamu basin (Rop, 2003; NOCK, 1995). The present day knowledge indica ...
Tectonically restricted deep-ocean circulation at the end of the
... Available online 22 April 2013 ...
... Available online 22 April 2013 ...