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Alex Allan Formation

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Journal Article
Published: 01 April 1985
Canadian Journal of Earth Sciences (1985) 22 (4): 538–552.
... Formation, the new Alex Allan Formation, and the new (informal) Sugar limestone. The Greenberry Formation is largely an upper Tournaisian limestone composed of transported bioclastic debris that was deposited in shallow water. Limestone of the Alex Allan Formation disconformably overlies the Greenberry...
Journal Article
Published: 01 December 2019
South African Journal of Geology (2019) 122 (4): 397–420.
...L.D. Ashwal Abstract On the last page of his 1937 book “Our Wandering Continents” Alex Du Toit advised the geological community to develop the field of “comparative geology”, which he defined as “the study of continental fragments”. This is precisely the theme of this paper, which outlines my...
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Series: SEPM Special Publication
Published: 01 January 2003
DOI: 10.2110/pec.03.78.0333
EISBN: 9781565763340
... on the craton side of this foreland basin. Strawn Formation carbonate rocks in three cores—Conoco Anna McClung #3-1, Alex Mitchell #2-1R, and Creek Ranch #10-1—show several shallowing-upward sequences, each a few meters thick. The Creek Ranch core displays the deepest-water characteristics of the three cores...
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Series: SEPM Special Publication
Published: 01 January 2003
DOI: 10.2110/pec.02.74.0123
EISBN: 9781565762114
... of reef-rimmed platforms (Fammenian), (2) demise of algal-constructed margins concomitant with biotic recovery and formation of ramps (Tournaisian-Lower Visean), (3) deposition of microbial boundstone in upper slopes and early stabilization of ooid grainstone to form shoal-rimmed platforms (Middle Visean...
Journal Article
Published: 01 November 2013
American Mineralogist (2013) 98 (11-12): 2105–2114.
... as a two-component mixture containing extreme value and/or log-normally distributed nanoparticles. Analysis of the time-dependent formation of bacterial magnetite revealed that the magnetite size distribution transforms from the initial log-normal (young bacterial culture) through normal-like toward...
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Journal Article
Journal: AAPG Bulletin
Published: 01 March 1998
AAPG Bulletin (1998) 82 (3): 387–411.
... with one another and allow hydrocarbons to spill across sand-on-sand contacts ( Smith, 1980 ; Allan, 1989 ). In addition to providing vertical or lateral migration pathways, sealing faults are important trap components in many fields ( Fowler, 1970 ; Smith, 1980 ; Bouvier et al., 1989 ; Jev et al...
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Journal Article
Journal: Geosphere
Published: 01 June 2016
Geosphere (2016) 12 (3): 809–841.
...Craig Magee; James D. Muirhead; Alex Karvelas; Simon P. Holford; Christopher A.L. Jackson; Ian D. Bastow; Nick Schofield; Carl T.E. Stevenson; Charlotte McLean; William McCarthy; Olga Shtukert Abstract The structure of upper crustal magma plumbing systems controls the distribution of volcanism...
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Journal Article
Published: 24 August 2017
Canadian Journal of Earth Sciences (2017) 54 (12): 1214–1227.
...Siobhan McGoldrick; Alex Zagorevski; Dante Canil In northwestern British Columbia, the Permian Nahlin ophiolite in the northern Cache Creek terrane comprises spinel harzburgite tectonite with minor lherzolite, lower crustal mafic and ultramafic cumulates, gabbroic rocks including dikes intruding...
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Journal Article
Journal: Economic Geology
Published: 01 February 2019
Economic Geology (2019) 114 (1): 93–116.
...Roisin Kyne; Koen Torremans; John Güven; Robert Doyle; John Walsh Abstract Faults are important structures in the formation of many mineral deposits, often acting as conduits for ore-forming fluids and sometimes providing, or generating, the bounding structures to associated mineralizing sites...
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Journal Article
Published: 31 October 2001
Canadian Journal of Earth Sciences (2001) 38 (11): 1601–1613.
...E.A. Christiansen; E. Karl Sauer Abstract The Saskatoon Low is a collapse structure that formed as a result of dissolution of salt from the Middle Devonian Prairie Evaporite Formation. In this study, the collapse has affected the Up per Cretaceous Lea Park, Judith River, and Bearpaw formations...
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Series: Geological Society, London, Special Publications
Published: 01 January 2006
DOI: 10.1144/GSL.SP.2006.256.01.01
EISBN: 9781862395046
... of the Space Age. This was agreed and a format of about 24 articles was designed, approaches being made to selected authors. The sections of this Special Publication relate to the early development of meteoritics as a science; collecting and museum collections; researches establishing the provenance...
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Journal Article
Published: 01 December 2005
The Canadian Mineralogist (2005) 43 (6): 2099–2116.
... accrue d’énergie: cycle ouvert, cycle fermé, ou une combinaison symbiotique de différents types de réacteur (par exemple, réacteur thermique et réacteur à neutrons rapides). Le spectre d’énergie neutronique exerce un effet important sur le taux de formation des produits de fission; la...
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Journal Article
Journal: Economic Geology
Published: 01 September 2017
Economic Geology (2017) 112 (6): 1395–1418.
... a Late Cretaceous age for mineralization and constrains the temporal evolution of arc plutonism and Ni-sulfide ore formation in a convergent margin setting. The Giant Mascot intrusion is a crudely elliptical, 4-km 2 plug composed of dunite, peridotite, pyroxenite, hornblende pyroxenite, and hornblendite...
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Journal Article
Journal: Economic Geology
Published: 01 November 2015
Economic Geology (2015) 110 (7): 1779–1801.
..., the obtained age is to be considered as preliminary. Yet, the obtained age is fully consistent with geologic evidence reported by previous authors and pointing to Middle Ordovician timing of ore formation. The ID-TIMS data were complemented by laser ablation-inductively coupled plasma mass spectrometry (LA...
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Book Chapter

Series: GSA Special Papers
Published: 01 January 2006
DOI: 10.1130/0-8137-2405-8.v
... of the earliest impact evidence on the Earth's surface. Richard Grieve and coworkers examine the results of modeling of differential scaling of impact melt and transient cavity volumes on the Earth, with a comparison of lunar evidence. They investigate the formation of giant impact melt pools on the early Earth...
Journal Article
Published: 01 September 2015
South African Journal of Geology (2015) 118 (3): 305–306.
..., 1998 ). This Lexicon, available online at abridgedlexicona@gmail.com , will be updated to incorporate the ICS approved units. In this first issue, we publish the Elliot, Emakwezini, Graauw Duinen and Witzand Formations along with the George Pluton. It is planned that several such descriptions...
Journal Article
Published: 01 January 2020
Journal of Paleontology (2020) 94 (1): b1–b2.
.... BRUCE LIEBERMAN, Univ. of Kansas ALEX LIU, Univ. of Cambridge STEVEN LoDUCA, Eastern Michigan Univ. RICK LUPIA, Univ. of Oklahoma GABRIELA MÁNGANO, Univ. Saskatchewan GREG McDONALD, Bureau of Land Management MALGORZATA MOCZYDLOW SKA-VIDAL, Uppsala Univ. RICHARD MOOI, California Academy of Sciences...
Journal Article
Published: 01 April 2000
Exploration and Mining Geology (2000) 9 (2): iii–iv.
..., with the assistance of other geologists. I gratefully acknowledge fruitful discussions with and suggestions made by Alex Brown, Michel Jébrak, Don Sangster, and Dave Sinclair. They helped me build the format of the first two days of the presentations, and supplied me with many names of key people to contact. I wish...
Journal Article
Published: 01 November 2019
Journal of Paleontology (2019) 93 (6): b1–b4.
... Univ. BRUCE LIEBERMAN, Univ. of Kansas ALEX LIU, Univ. of Cambridge STEVEN LoDUCA, Eastern Michigan Univ. RICK LUPIA, Univ. of Oklahoma GABRIELA MÁNGANO, Univ. Saskatchewan GREG McDONALD, Bureau of Land Management MALGORZATA MOCZYDLOW SKA-VIDAL, Uppsala Univ. RICHARD MOOI, California Academy...
Journal Article
Published: 01 November 2019
Journal of Paleontology (2019) 93 (6): f1–f4.
... to the journal website at: cambridge.org/jpa JOURNAL of PALEONTOLOGY VOL 93 | NO 6 | NOVEMBER 2019 1047 Qing Tang, Jie Hu, Guwei Xie, Xunlai Yuan, Bin Wan, Chuanming Zhou, Xu Dong, Guohua Cao, Bruce S. Lieberman, Sally P. Leys, and Shuhai Xiao A problematic animal fossil from the early Cambrian Hetang Formation...