1-20 OF 76 RESULTS FOR

Analcite Bed

Results shown limited to content with bounding coordinates.
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
×Close Modal
Sort by
Journal Article
Published: 01 August 1946
American Mineralogist (1946) 31 (7-8): 357-364.
... and the fourth was mainly dolomite. Associated with one or more of these concretions were these minerals: analcite, brammallite, calcite, dolomite, kaolinite, melanterite, pyrite, and an unknown mineral. The Pittsburgh coal bed is of Pennsylvanian age, and the base of the Monongahela formation. Analcite has been...
Journal Article
Published: 01 February 1970
Canadian Journal of Earth Sciences (1970) 7 (1): 46-66.
...T. H. Pearce Abstract The lower Cretaceous Crowsnest Formation of the Crowsnest Pass area, Alberta, is predominantly trachytic, but some sodic, analcite-rich, rocks occur. It consists of bedded pyroclastic and epiclastic material with minor flows and dikes. Most of the volcanism appears to have...
Journal Article
Published: 01 October 1941
American Mineralogist (1941) 26 (10): 627-629.
...Clarence S. Ross Abstract Analcite from sedimentary beds was described from two widely separated localities in 1928, 1 one from Utah, Colorado, and Wyoming; and the other from near Wikieup, Arizona. 2 Bradley stated, “Field and microscopic study of these two types of zeolite-bearing rocks indicates...
Journal Article
Journal: Geology
Published: 01 June 2010
Geology (2010) 38 (6): 527-530.
...M. Elliot Smith; K.R. Chamberlain; B.S. Singer; A.R. Carroll Abstract U-Pb ages of zircon from the Firehole and Analcite ash beds in the Eocene Green River Formation (Wyoming, United States) are indistinguishable from 40 Ar/ 39 Ar ages of sanidine after adjusting the latter to the astronomically...
FIGURES
Journal Article
Published: 01 October 1961
American Mineralogist (1961) 46 (9-10): 1017-1029.
...-analcite subfacies in joints, and those of the laumontite subfacies in bedding veins, faults and shear zones. Comparison with the stratigraphic distribution of diagenetic minerals indicates the irregular veins are diagenetic. Later the zeolite facies veins formed under lower P-T conditions, those...
Journal Article
Journal: GSA Bulletin
Published: 01 May 2003
GSA Bulletin (2003) 115 (5): 549-565.
... Bed, Grey, Main, Sixth, and Analcite tuff beds from the Tipton, Wilkins Peak, and Laney Members yielded weighted-mean ages (±2σ analytical uncertainties) of 51.25 ± 0.31 Ma, 50.70 ± 0.14 Ma, 50.56 ± 0.26 Ma, 50.39 ± 0.13 Ma, 49.96 ± 0.08 Ma, 49.70 ± 0.10 Ma, and 48.94 ± 0.12 Ma, respectively. Ages...
FIGURES | View All (9)
Journal Article
Journal: GSA Bulletin
Published: 01 November 2015
GSA Bulletin (2015) 127 (11-12): 1711-1729.
... from 7.37% to 23.3%, and analcite is present only in minor amounts (less than 2%), but porosity could be near 0% in samples with high calcite II concentrations (up to 24%; Table 2 ). Red beds and bleached outcrops of the Candeleros and Huincul Formations and the main structures were mapped...
FIGURES | View All (14)
Journal Article
Journal: AAPG Bulletin
Published: 01 December 2017
AAPG Bulletin (2017) 101 (12): 1995-2019.
... reservoirs experienced initial rapid subsidence, uplift, and further subsidence, and diagenetic reactions occurred in these reservoirs involving compaction; precipitation of chlorite clays, calcites, zeolites, iron oxides, kaolinite, and quartz cements; and dissolution of unstable minerals including analcite...
FIGURES | View All (16)
Journal Article
Published: 01 July 2002
Journal of the Geological Society (2002) 159 (4): 469-483.
...M.A. WORTHING; A.R. WILDE Abstract Six small basanite intrusions were emplaced into the allochthonous Batain Nappes of NE Oman along approximately north–south to NNW–SSE lineaments. They contain olivine, clinopyroxene, plagioclase, analcite, ulvöspinel and apatite ± biotite ± calcite...
FIGURES | View All (13)
Journal Article
Published: 16 June 2008
Geological Magazine (2008) 145 (6): 858-867.
...RICHARD A. BATCHELOR; ANTHONY R. PRAVE; GRAHAME J. H. OLIVER; ANDREW S. RAEBURN Abstract The discovery of volcanogenic ‘brown beds’ in Dalradian and Torridonian (Sleat Group and Diabaig Group) sequences in Scotland has raised questions about their origin and provenance. New discoveries of a grey...
FIGURES | View All (9)
Journal Article
Published: 01 May 2014
Journal of Sedimentary Research (2014) 84 (5): 373-393.
...-induced alteration. The Huincul Formation (late Cenomanian–early Turonian) is part of the thick continental red-bed-dominated Neuquén Group, which consists of meandering fluvial deposits developed in a foreland basin. Visual distinctions reveal four diagenetic facies: red, white, gray, and minor brown...
FIGURES | View All (13)
Journal Article
Published: 01 October 2001
Mineralogical Magazine (2001) 65 (5): 571-587.
... experiments to investigate the stability of analcime under hyperalkaline porefluid conditions have been performed. Experiments used both batch and fluidized bed equipment at 25, 50, 70 and 90°C in K-based pH buffer solutions, both under- and over-saturated with respect to analcime. Results from dissolution...
FIGURES | View All (10)
Journal Article
Journal: GSA Bulletin
Published: 01 January 2010
GSA Bulletin (2010) 122 (1-2): 236-252.
... geochronology constrains the duration of the isotopic shift to ≤∼200,000 years. This change coincides with a sudden change in lake type, from balanced-filled in the lower LaClede Bed to overfilled in the upper LaClede Bed, as well as an increase in the proportion of calcitic (>80% calcite out of total...
FIGURES | View All (9)
Journal Article
Journal: GSA Bulletin
Published: 01 January 2008
GSA Bulletin (2008) 120 (1-2): 54-84.
...M. Elliot Smith; Alan R. Carroll; Brad S. Singer Abstract Numerous 40 Ar/ 39 Ar experiments on sanidine and biotite from 22 ash beds and 3 volcaniclastic sand beds from the Greater Green River, Piceance Creek, and Uinta Basins of Wyoming, Colorado, and Utah constrain ∼8 m.y. of the Eocene Epoch...
FIGURES | View All (16)
Journal Article
Published: 01 June 2010
Journal of Sedimentary Research (2010) 80 (6): 492-514.
... of sedimentary fill in the nonmarine greater Green River Basin. In the Washakie Basin, major features used to construct the correlation include a horizon of meter-scale mudcracks observed at the base of the buff marker bed ( Rhodes et al. 2007 ), the Analcite Tuff, and the balanced-filled to overfilled lake...
FIGURES | View All (17)
Journal Article
Published: 01 January 2001
Journal of Sedimentary Research (2001) 71 (1): 101-106.
... marine environment, with high background sedimentation rates allowing rapid burial and preservation. Absence of bioturbation precluded the thin ash beds from mixing with enclosing sediment. The average interval between explosive eruptions in the volcanic arc of the Antarctic Peninsula during the Early...
FIGURES | View All (5)
Journal Article
Journal: AAPG Bulletin
Published: 01 March 2015
AAPG Bulletin (2015) 99 (3): 525-554.
...M. J. Pons; A. L. Rainoldi; M. Franchini; A. Giusiano; N. Cesaretti; D. Beaufort; P. Patrier; A. Impiccini ABSTRACT The Portezuelo Formation is part of a red bed sequence in the Neuquén Basin assigned to the Neuquén Group (lower Cenomanian–middle Campanian). In outcrops of the Portezuelo Formation...
FIGURES | View All (11)
Journal Article
Published: 10 January 2018
Scottish Journal of Geology (2018) 54 (1): 37-49.
... are characterized by syngenetic concretionary pyrite ( c. 15% total area), occurring as bedding-parallel banding, and later-formed (epigenetic) cross-cutting pyrite in cleats ( c. 9% total area). In these, sulphur isotope compositions for both syngenetic and epigenetic pyrite include isotopically light and heavy...
FIGURES | View All (7)
Journal Article
Journal: GSA Bulletin
Published: 01 March 2010
GSA Bulletin (2010) 122 (3-4): 454-464.
... to form duplex structures south of Bennane Head, ∼5 km north of Ballantrae. Five tuff beds, all in chert, have similar U-Pb zircon ages of ca. 470 ± 10 Ma. The geometrical polarity of the duplexes and the zircon ages provide new constraints on the tectonic evolution of the accretionary wedge...
FIGURES | View All (9)
Journal Article
Published: 01 September 2005
South African Journal of Geology (2005) 108 (2): 173-186.
... in the Kruger National Park provides cogent additional information. The Shishwayini Beds at the base of the succession represents volcaniclastic deposits on the Tshipise Sandstone Member of the Clarens Formation. The rest of the Mashikiri Formation in the Olifants River section is nephelinite in which nepheline...
FIGURES | View All (15)