Interstratal dewatering origin for polygonal patterns of sand-filled cracks: a case study from late Proterozoic metasediments of Islay, Scotland [PDF]
, 1998 Sand-filled cracks from the Lower Fine-grained Quartzite of Dalradian (late Proterozoic) age on the Island of Islay, western Scotland, may be divided into two main types, both of which form orthogonal and non-orthogonal closed patterns on bedding ...
Tanner, P.W.G
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When Proterozoic Crusts Became Thick: New Insights from Magma Petrology
Geosciences, 2018 The Earth’s continental crust represents the outermost envelope of the solid Earth, controlling exchanges within the geosphere and reflecting geodynamics processes.
Jérôme Ganne +7 more
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Early Ediacaran collision zone (ca. 620 Ma) in Saudi Arabia and Yemen inferred from aeromagnetic mapping [PDF]
LithosphereThe tectonic terranes in the Proterozoic outcrops in Saudi Arabia are separated from those in Yemen by extensive regions that are covered by Phanerozoic sedimentary rocks and Tertiary volcanics.
Moujahed Al-Husseini, Ian C.F. Stewart
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Enigmatic Mid‐Proterozoic Orogens: Hot, Thin, and Low
Geophysical Research Letters, 2021 Since the Archean, secular change in orogenic style is demonstrated through evolution of metamorphic conditions and geochemical proxies. Linked to orogenic style is the amount of crustal thickening and elevation, whereas orogenic vigor is related to the ...
Christopher J. Spencer +2 more
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Archean versus Phanerozoic oceanic crust formation and tectonics: Ophiolites through time
Geosystems and Geoenvironment, 2022 A global compilation of structural, lithological, and geochemical data on a selection of Archean, Proterozoic and Phanerozoic magmatic complexes, interpreted as ophiolites, is presented.
Harald Furnes, Yildirim Dilek
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The Cambrian Explosion: macroevolution and biomineralization
Academia Biology, 2023 Recent advances in our understanding of the Cambrian evolutionary diversification event (Cambrian Explosion) show that, although eumetazoan stem taxa were present in the late Proterozoic, a tremendous burst of macroevolutionary change occurred near the ...
Mark A. S. McMenamin
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The early Proterozoic Saari-Kiekki greenstone belt: A representative of the Sariola Group at Kuhmo, Eastern Finland [PDF]
Bulletin of the Geological Society of Finland, 1989 The early Proterozoic Saari-Kiekki greenstone belt in Kuhmo, eastern Finland, is the deformed remnant of a NW‒SE-trending elongate structural basin c. 15 km long and up to 3 km wide.
E.J. Luukkonen
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International Journal of Geoheritage and Parks, 2019 The Pilbara region of Western Australia, covering some 500 km × 500 km, provides a diversity of Archaean to Proterozoic igneous rocks in a relatively compact area that records a younging southward crustal history of igneous activity, sedimentation, early
V. Semeniuk, M. Brocx
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Proterozoic, Archeam and other weeds in the Precambrian rock garden [PDF]
Bulletin of the Geological Society of Finland, 1970 The use of the terms Precambrian; Proterozoic, Algonkian, and Archean; Cryptozoic and Archeozoic; and Eocambrian, Infracambrian, and Subcambrian is discussed.
K. Rankama
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Evidence that the GOE was a prolonged event with a peak around 1900 Ma
Geosystems and Geoenvironment, 2022 The great oxygenation event (GOE), the first of two major rises in atmospheric oxygen in Earth history, was initially placed near the Archean-Proterozoic boundary (∼2500 Ma). More recently, the position of the GOE has been moved to between 2500 and 2300
Ross R. Large +5 more
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