windblown rocks and trails

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Journal Article
Journal: Geosphere
Published: 01 February 2011
Geosphere (2011) 7 (1): 260–275.
... delineating units based upon surficial characteristics affecting dust emission (e.g., soil texture, rock cover, surface crusts, and vegetation) was created. Seventeen surface units are grouped into four major classes (sand, silt and clay, rock covered, and active drainages). A >500 km network of trackways...
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Journal Article
Journal: Geophysics
Published: 31 October 2007
Geophysics (2007) 72 (6): B161–B174.
... a penetration through windblown silts that returned a signal from a partially buried lava. He reports penetration of 1.8 m through dry, windblown sediments in the center of the crater. AIRSAR data are acquired by the radar program of NASA and the Jet Propulsion Laboratory (JPL). AIRSAR images (10...
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Journal Article
Journal: AAPG Bulletin
Published: 01 October 1933
AAPG Bulletin (1933) 17 (10): 1194–1212.
...Donald C. Barton ABSTRACT The drainage pattern of the Reynosa Plain area from Guadalupe River to the windblown sand area south of Hebbronville, Duval County, shows a peculiar series of straight north-south, northeast-southwest, and northwest-southeast stream courses, which indicate corresponding...
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Journal Article
Journal: Geology
Published: 01 April 2013
Geology (2013) 41 (4): 471–474.
... derived from local country rock. We dated three surface-deposited carbonate samples from mounds L2 and L4: although these samples show some evidence of windblown contamination, their ages agree well with veins from the same mounds (Table DR1 in the Data Repository). The ages of the dated mounds...
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Journal Article
Published: 01 August 1977
Bulletin of Canadian Petroleum Geology (1977) 25 (4): 713–735.
.... A CUPRIFEROUS CYCLE ON WHISTLER MOUNTAIN The distribution of copper in the Grinnell Formation at Whistler Mountain is related to distinct sedimentary cycles (Figs. 7, 8). Chemical analyses performed by the Cominco Ltd. laboratory in Trail, B.C. on samples collected by M. Osatenko show that the various rock...
Journal Article
Published: 01 May 2002
Bulletin of the Seismological Society of America (2002) 92 (4): 1333–1340.
... of the Pisgah Crater cone, leaving trails on slope surfaces and bounce pits on the flat quarry floor where they came to rest. Rock falls and associated slide trails and boulder bounce pits are commonly observed in earthquakes (see Reil, 1957 ; Wallace, 1984 ); we also observed them at the bases of steep...
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Journal Article
Journal: GSA Bulletin
Published: 01 March 2015
GSA Bulletin (2015) 127 (3-4): 503–515.
... of Kīlauea, embedding lapilli in the muddy ash and crossing the trail along which the footprints occur. The pyroclastic density currents were most likely responsible for the fatalities, as judged from the reported condition and probable location of the bodies. This reconstruction is relevant today...
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Journal Article
Published: 01 September 1987
Bulletin of Canadian Petroleum Geology (1987) 35 (3): 333–357.
... feeding burrows; sinuous crawling traces; vertical, cylin- drical to irregular shafts;t racks and trails. Inver- tebrates mostly deposit feeders or predators; vertebrates are grovelers, predators, or herbi- vores. Invertebrate diversity typically low, yet some traces may be abundant. Vertebrate tracks may...
Journal Article
Journal: AAPG Bulletin
Published: 01 May 1933
AAPG Bulletin (1933) 17 (5): 488–522.
... section in many places and are floored on or in the underlying strata. Soil in the basins represents the insoluble matter of the caliche mixed with some recent windblown sand and silt and possibly with some of the original soil above the caliche. Discrimination of the caliche of the Upper Reynosa from...
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Journal Article
Journal: Economic Geology
Published: 01 August 2023
Economic Geology (2023) 118 (5): 967–998.
...Hilke Dalstra; Adam Black; Inna Mudrovska Abstract The Winu-Ngapakarra Cu-Au deposit (Winu) was discovered in late 2017. Winu is hosted in metamorphosed massive sandstones, siltstones, and lesser mafic rocks that are possible distal and deep-water correlatives of the Malu Formation of the Yeneena...
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... We wish to thank the Center for Great Plains Studies at Emporia State University (ESU) for encouraging our interest in and exploration of the Santa Fe Trail and other aspects of the region. Financial support for aerial photography was provided by grants from NASA and ESU. Support for documenting...
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Journal Article
Published: 01 March 2013
Journal of the Geological Society (2013) 170 (2): 327–339.
... source rock in North Africa, organic enrichment is distributed unevenly. For example, in Al Kufrah Basin, Libya, ‘hot shales’ are elusive, but outcrop analysis at the western basin demonstrates why this is the case. The topmost Mamuniyat Formation, of Hirnantian age, comprises glaciogenic sandstones...
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Journal Article
Journal: AAPG Bulletin
Published: 01 January 1999
AAPG Bulletin (1999) 83 (1): 155–169.
... sedimentary succession. Use of the total gamma-ray measurement alone for analysis of this kind, however, is fraught with difficulties because of ambiguities in the mineralogical origin of the radiation from the sediment ( Rider, 1990 ). Natural gamma-radiation emissions from sedimentary rocks result...
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Journal Article
Published: 20 July 2011
Canadian Journal of Earth Sciences (2011) 48 (7): 1185–1198.
... wind regimes and high sand supply, LWD can trap appreciable amounts of windblown sand in the backshore, which can enhance foredune development and stabilization (roles typically played by vegetation) on stable or prograding shorelines. This additional store of sediment provides an important buffer...
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Journal Article
Published: 01 January 2004
Rocky Mountain Geology (2004) 39 (2): 93–111.
... descriptions for Fox Hills Formation of South Dakota and Hell Creek Formation of North Dakota. Asterisks (*) indicate rock units present at Concordia Hadrosaur Site. Figure 2. Panorama of 470 meter-long bluff examined, showing areas referred to in text. View is to northeast. Offset on fault between...
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Journal Article
Journal: AAPG Bulletin
Published: 01 August 1957
AAPG Bulletin (1957) 41 (8): 1704–1747.
... non-distinctive. Correct interpretation of this environment in ancient rocks depends on the recognition of distinctive structures in deposits of adjacent environments, especially the barriers that separate it from the sea, and on features of composition and texture. Tidal-flat deposits, including...
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Journal Article
Published: 09 March 2022
Environmental & Engineering Geoscience (2022) 28 (3): 255–273.
...). This dormant landslide is approximately 2-km long by 1-km wide, with a total areal extent of 1.9 km 2 . It occurred on a 12.5° slope in loess (windblown silt) deposits overlying schist bedrock. We interpret the T440 as a flow slide in loess ( Hungr et al., 2001 ) that occurred sometime during the late...
Journal Article
Journal: AAPG Bulletin
Published: 01 July 1937
AAPG Bulletin (1937) 21 (7): 833–898.
... deposited upon a floor of Triassic and Cretaceous rocks. It is capped by a Quaternary (?) caliche approximately 10 feet thick, which is in turn covered in places by Recent windblown sands and silts. The deposits of the plain thin out toward the south where the Cretaceous rocks of the Edwards Plateau come...
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Journal Article
Published: 22 October 2020
Journal of Sedimentary Research (2020) 90 (9): 1011–1036.
... ), pictured in Figure 13 D, is preserved in negative epirelief on a bedding plane in trough cross-stratified, fine-grained sandstone ( Fig. 14 B). The ichnofossil may represent a gastropod grazing trail that is known from rocks of Ediacaran and Cambrian age ( Crimes 1992 ; MacNaughton and Narbonne 1999...
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Journal Article
Journal: Geosphere
Published: 23 March 2023
Geosphere (2023) 19 (3): 719–747.
... carb (refers to “marine carbonate rocks”) values in the FMD dropped to −2.7‰, and the Steptoean Positive Carbon Isotope Excursion (SPICE), when the values rose to +3.5‰. The forma tion consists of eight lithofacies deposited in shallow subtidal to peritidal paleoenvironments. At its stratotype...
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