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Nut Beds

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Journal Article
Published: 01 July 2003
Journal of Paleontology (2003) 77 (4): 821–822.
... The Paleontological Society 2003 Woods of the Eocene Nut Beds Flora, Clarno Formation, Oregon, USA. E. A. Wheeler and S. R. Manchester. 2002. IAWA Journal, Supplement 3, 188 p. The middle Eocene age Clarno Nut Beds Flora in north-central Oregon is one of the most significant fossil...
Journal Article
Journal: PALAIOS
Published: 01 June 2003
PALAIOS (2003) 18 (3): 296–297.
... unprepossessing lumps of black permineralized wood. Now that treasure chest is open for everyone to see in all its intriguing complexity. Eocene vegetation of the Clarno Nut Beds was humid subtropical forest vegetation of high diversity dominated by angiosperms, whose current diversity makes comprehensive...
Series: GSA Field Guide
Published: 01 January 2009
DOI: 10.1130/2009.fld015(07)
EISBN: 9780813756158
... Locality Age (Ma) MAT (°C) MAT Error(°C) # Dicot Leaves West Branch Creek 45 13.99 2.35 41 White Cliffs 44.5 14.29 1.94 61 Clarno Nut Beds 44 17.05 1.84 69 John Day Gulch 40 10.32 2.20 40 Kings Gap 39 15.50 3.18 19 White Cap Knoll 39 9.09...
Journal Article
Journal: PALAIOS
Published: 01 October 1999
PALAIOS (1999) 14 (5): 459–474.
... range in temperature throughout the year, it would be surprising if wood anatomical characters were more finely tuned to temperature. Mean annual temperature (MAT) was estimated from five fossil wood assemblages: Yellow-stone, Wyoming (early Eocene); Clarno Nut Beds, Oregon (middle Eocene); Post, Oregon...
Journal Article
Journal: Geosphere
Published: 01 December 2012
Geosphere (2012) 8 (6): 1207–1230.
... for long (>100 km) distances, thereby providing unique information on how such flows evolve. These beds were deposited by large and infrequent flows in a low-relief basin plain. An almost complete lack of bed amalgamation aids bed correlation, and resembles some modern abyssal plains, but contrasts...
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Journal Article
Journal: GSA Bulletin
Published: 01 July 2009
GSA Bulletin (2009) 121 (7-8): 1172–1178.
... Nut Beds Flora, Clarno Formation, Oregon, USA: International Association of Wood Anatomists Journal Supplement , v. 3 , 188 p. Wiemann M.C. Wheeler E.A. Manchester...
FIGURES | View All (7)
Journal Article
Published: 01 January 2013
Journal of Sedimentary Research (2013) 83 (1): 115–131.
... the Hirnantian deglaciation sequence. They are distributed within a 20 meter thick stratal interval and, at present, relicts of them still occupy several square kilometers in map view. The circular to ovoidal structures, which comprise fluvial sandstone beds and are sealed by shallow marine strata, occur...
FIGURES | View All (13)
Journal Article
Journal: AAPG Bulletin
Published: 01 July 1935
AAPG Bulletin (1935) 19 (7): 1043–1052.
...P. G. Nutting ABSTRACT The bleaching clays of commercial interest are the active clays of the Southeast and the activable bentonites of the Southwest and Southeast. No first-class clays of either type have yet been found in the Mid-Continent region. All the best active clays are substantially equal...
Journal Article
Journal: Geology
Published: 01 January 2011
Geology (2011) 39 (1): e233.
... strategy, we carefully sampled, bed by bed, several sections representing ∼80 m of well-calibrated Smithian strata. It is trivial that any type of surface collection method is biased because small species are underrepresented. The purpose of our paper was not to estimate the full size distribution...
Journal Article
Journal: GSA Bulletin
Published: 01 September 2015
GSA Bulletin (2015) 127 (9-10): 1194–1208.
... aggrading low-energy pelagic muds occasionally intercalated by event beds such as sediment gravity flow deposits (e.g., Girardclos et al., 2007 ; Normandeau et al., 2013 ) and/or beds related to river-derived hyperpycnal flows (e.g., Zavala et al., 2006 ). As a result, the lacustrine record has been...
FIGURES | View All (8)
Journal Article
Journal: Geology
Published: 01 February 2010
Geology (2010) 38 (2): 147–150.
... beds; Fig. DR2). Calibration of the ammonoid zonation by means of U/Pb ages indicates that these gastropods postdate the P-T boundary by 1–2 Ma ( Galfetti et al., 2007 ). Large gastropods from western Utah were found in both shale intervals and in limestone beds of the studied section ( Brayard et al...
FIGURES | View All (4)
Journal Article
Journal: Economic Geology
Published: 01 September 2003
Economic Geology (2003) 98 (6): 1225–1241.
... and core complexes. The gold deposits are predominantly in thin-bedded units, preferentially at and above contacts between thick-bedded to massive carbonate and overlying calcareous clastic units ( Fig. 4 ). The primary host is the Devonian to Mississippian Pilot Shale, which consists of calcareous...
FIGURES | View All (12)
Journal Article
Journal: AAPG Bulletin
Published: 01 October 1987
AAPG Bulletin (1987) 71 (10B): 60–67.
... the traditionally more productive part of the state. The well, drilled to a total depth of 5,705 ft, tested the stratigraphic section from part of the Pennsylvanian to the Knox Megagroup (Cambrian and Ordovician). The older rocks proved to be nonproductive, although several porous sandstone beds were encountered...
FIGURES | View All (5)
Journal Article
Journal: Economic Geology
Published: 01 September 2007
Economic Geology (2007) 102 (6): 1129–1155.
.... In and near the Bald Mountain pluton, quartz stockworks and veins host ore at the Top, Mahoney, and Sage Flat deposits, whereas in the peripheral Rat and LJ Ridge deposits, ore is both discordant and concordant to bedding. F ig . 2. Gold deposits in the Bald Mountain area. Deposits in bold...
FIGURES | View All (17)
Series: Geological Society, London, Special Publications
Published: 01 January 2016
DOI: 10.1144/SP411.3
EISBN: 9781862396999
... The definition does not discriminate as to whether an Aboriginal object is on land or underwater. The riverbeds or waterways and the beds of enclosed waters (bays, drowned river valleys, landwards of a chain of offshore islands) form part of the State of NSW. Although NSW has jurisdiction...
FIGURES | View All (14)
Journal Article
Journal: The Leading Edge
Published: 01 January 2005
The Leading Edge (2005) 24 (1): 72–75.
... for energy motivates the oil and gas industry to develop reservoirs that are continually more difficult to produce. These difficulties are due to the reservoir characters (tight gas sands, coal bed methane reservoirs, condensate reservoirs, deep and ultradeep reservoirs, etc.) or their history (mature fields...
FIGURES | View All (10)
Series: AAPG Studies in Geology
Published: 01 January 2009
DOI: 10.1306/13171239St593381
EISBN: 9781629810317
... intervals (Three Lick Bed-Chagrin and middle Huron) are typical only where temperature, density, and audio anomalies indicate fracturing of the shale with gas entry into the borehole. Nitrogen is most commonly used as the carrier fluid in hydraulic fracturing stimulations, which are intended to intersect...
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Series: Geological Society, London, Petroleum Geology Conference series
Published: 01 January 2010
DOI: 10.1144/0071025
EISBN: 9781862394131
... data sets available which image the whole crustal structure. The base basalt is interpreted to be a transitional zone of thinly bedded tuffs, lavas and sediments as there is usually no clear seismic event associated with the base (Fig.  3 ). However, deeper stratal reflections are clearly imaged...
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Series: Geological Society, London, Special Publications
Published: 01 January 2012
DOI: 10.1144/SP363.8
EISBN: 9781862396111
... seawards and salt can easily slide down the margin. Freeboard is defined as the difference between the maximum height of the frontal salt sheet and the regional elevation of the sea bed outboard of the salt sheet on the abyssal plain. The maximum freeboard of 957 m occurs in the northern Campos where...
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Journal Article
Published: 01 June 2016
Environmental Geosciences (2016) 23 (2): 95–122.
FIGURES | View All (17)