1-20 OF 989 RESULTS FOR

indurated limestone

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 January 1967
Micropaleontology (1967) 13 (1): 107-110.
... series of sections observed in this way provides a clear impression of the test's internal organisation, and provides an excellent opportunity to relate random two-dimensional sections to the complete structure. Thin sections are prepared by coring the selected specimen from the limestone by means...
Journal Article
Published: 01 January 2004
Micropaleontology (2004) 50 (3): 307-312.
... of the two disaggregation techniques must be inherent to the treatment, as the two sub-samples were obtained from the same sample. In many basins, recovering foraminifera from indurated limestones poses considerable problems. Traditional techniques such as simple water soaking or methods using...
FIGURES
Journal Article
Published: 01 September 2014
Journal of Micropalaeontology (2014) 33 (2): 193-203.
...Alice E. Kennedy; Angela L. Coe Abstract Microfossil extraction from indurated mudrocks is widely acknowledged as challenging, especially for foraminifera. Here we report development of the freeze–thaw extraction method through the addition of rapid heating, detergent and ultrasound stages. We use...
FIGURES | View All (7)
Series: AAPG Memoir
Published: 01 January 1974
DOI: 10.1306/M22379C5
EISBN: 9781629812175
... phases in the Quaternary, and sea level reached approximately similar positions at the limit of each transgression. During marine phases, indurated limestones at the shore were beveled by marine erosion to form tidal terraces and seacliffs; locally, these limestones were overlain by marine sediments...
Journal Article
Published: 01 March 2002
Bulletin of Canadian Petroleum Geology (2002) 50 (1): 138-157.
.... Calcrete caps on some sand-flat bodies suggest that they filled prior to the main lowstand phase of paleosol development. A complex relationship is apparent between channel or valley fills and mature paleosols that bound sequences. Resistant substrates (coals, indurated limestones) influenced channel-body...
Journal Article
Published: 01 January 2004
Micropaleontology (2004) 50 (3): 301-306.
... sample depends on the clay content of the sample and its induration. In this method the processing time varies from 30 minutes for shales up to eight hours for micrites. Until recently it was impossible to extract calcareous microfossils from micritic limestone. Studies by Lethiers and Crasquin...
FIGURES | View All (4)
Journal Article
Published: 01 May 1999
Quarterly Journal of Engineering Geology and Hydrogeology (1999) 32 (2): 107-117.
... of induration of Palaeogene limestones in Denmark. Fracture intensity is also indicated. Moduli of elasticity calculated from acoustic velocities are systematically related to density (and thus porosity), so we have attempted to relate the degree of induration to the dynamic moduli of elasticity. The dynamic...
Journal Article
Published: 01 November 1986
Canadian Journal of Earth Sciences (1986) 23 (11): 1804-1822.
...Hans-G. Machel Abstract Limestone diagenesis of the Upper Devonian Nisku Formation in the subsurface of central Alberta began syndepositionally. Most early calcite cements are fibrous, bladed, and columnar and form isopachous precipitates in primary voids. Partial syndepositional induration...
Journal Article
Journal: AAPG Bulletin
Published: 01 September 1959
AAPG Bulletin (1959) 43 (9): 2167-2196.
... a fauna characteristic of the lower half of the Pennsylvanian and locally Late Mississippian. A hiatus representing Late Pennsylvanian time separates Middle Pennsylvanian and Permian faunas. The Arcturus formation, which conformably overlies the Ely limestone, consists of poorly indurated yellowish-gray...
Journal Article
Published: 01 January 2000
Rocky Mountain Geology (2000) 35 (2): 163-204.
... and Christiansen, 1985 ). The post-Laramide sequence is dominated by fine-grained, generally poorly indurated volcaniclastic debris and often is mapped as the Browns Park Formation (e.g., Montagne, 1991 ). Biostratigraphically informative fossils from these patches in the Hanna Basin, however, have yet...
FIGURES | View All (24)
Journal Article
Published: 01 July 1993
Journal of Sedimentary Research (1993) 63 (4): 607-619.
...Pierre-Andre Bourque; Frederic Boulvain Abstract From study of the Devonian "recifs rouges" of Belgium and the Silurian mounds of the Quebec Appalachians, we propose that deposition of the red stromatactis limestone facies of Cambrian-Devonian carbonate mounds was controlled by sponges...
Journal Article
Published: 01 June 1978
Journal of Sedimentary Research (1978) 48 (2): 453-473.
...G. Grover; J. F. Read Abstract Tidal-flat facies of the Middle Ordovician (Chazyan) New Market Limestone (0-67 m), southwestern Virginia. are fenestral. pellet-intraclast packstone/wackestone and lime mudstone. The unit unconformably overlies Lower Ordovician dolomites (Knox Group), interfingers...
Journal Article
Journal: GSA Bulletin
Published: 01 March 1978
GSA Bulletin (1978) 89 (3): 426-432.
... to the distribution of surficial deposits, which promote subsurface corrasion. Tower slope asymmetry occurs only in 35% of cases, and it is probably related to basal erosion, induration of the limestone surface being of secondary importance. Geological Society of America 1978 ...
Journal Article
Published: 01 June 1971
Journal of Sedimentary Research (1971) 41 (2): 435-443.
...E. C. Kettenbrink; Walter L. Manger Abstract The late Missourian Plattsburg Limestone in Wilson County, Kansas contains a well developed marine pisolite associated with a phylloid-algal mound complex. A striking feature shown by this pisolite is plastic deformation caused by compaction which...
Journal Article
Journal: GSA Bulletin
Published: 01 February 1967
GSA Bulletin (1967) 78 (2): 175-190.
... to form the units of the Miami Limestone. The eastern slope of the unstable oölite mound of the Cat Cay and Sandy Cay area is cut by tidal channels which run normal to the direction of the mound itself. Narrow valleys, similar to these channels, can be found in the indurated rock of the oölitic facies...
Journal Article
Published: 01 January 1992
Journal of Sedimentary Research (1992) 62 (1): 84-98.
... the progressive maturity seen in valley calcrete profiles. The vegetative role in the calcrete cycle is twofold. First, root mats spreading out laterally within the host limestone enhance dissolution of limestone and subsequent reprecipitation of carbonate cements. These processes result in well indurated...
Journal Article
Journal: Economic Geology
Published: 01 December 1982
Economic Geology (1982) 77 (8): 1912-1922.
...- to 5-m-thick zone of phosphorite, chert, mudstone, and magnesian limestone reflecting this transgression is exposed at West Thaniyat.The phosphorite consists of apatite, mostly in pellet form, and clastic quartz with minor montmorillonite or magnesian calcite, and was deposited on a shallow shelf...
Journal Article
Published: 01 July 1989
Journal of Sedimentary Research (1989) 59 (4): 539-547.
...Andreas Wetzel Abstract The cement volume in ooze, chalk and limestone drilled at Deep Sea Drilling Project Sites 504 and 505 (Pacific Ocean) was quantified by measuring porosity and consolidation characteristics. Heat flow clearly affects the lithification of pelagic ooze/chalk: the higher...
Journal Article
Journal: GSA Bulletin
Published: 01 May 2001
GSA Bulletin (2001) 113 (5): 659-670.
... found in veins and tabular bodies that crosscut or are stratabound within lake sediments. Indurated tufa is vuggy microcrystalline limestone, laminated carbonate, and carbonate-cemented sands and gravels that form mounds and ledges on the margin of the basin. Faults are considered to act as conduits...
FIGURES | View All (8)
Journal Article
Journal: Palynology
Published: 01 January 2007
Palynology (2007) 31 (1): 19-36.
..., and is decanted into a large vessel containing distilled water to further dilute the H 2 O 2 . If any undisaggregated sample remains, the procedure is repeated several times if necessary. Relatively indurated sedimentary lithotypes normally require several treatments. The reason for this stepwise treatment...
FIGURES | View All (5)