Nodule (geology) - Factbites

Nodule (geology) - Factbites
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Topic: Nodule (geology)

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	Nodule - Wikipedia, the free encyclopedia
		In geology, a nodule refers to a small knobbly rock or mineral cluster.
		In plant biology, a root nodule is a root outgrowth formed on the roots of legumes and house symbiotic bacteria that fix atmospheric nitrogen and provide it to the plant in exchange for carbon.
		In medicine, a nodule refers to a small aggregation of cells.
	en.wikipedia.org /wiki/Nodule (147 words)

	Nodule - Wikipedia, the free encyclopedia
		In geology, a nodule refers to a small knobbly rock or mineral cluster.
		In plant biology, a root nodule is a root outgrowth formed on the roots of legumes and house symbiotic bacteria that fix atmospheric nitrogen and provide it to the plant in exchange for carbon.
		In medicine, a nodule refers to a small aggregation of cells.
	en.wikipedia.org /wiki/Nodule (155 words)

	Geology of Kent and the Boulonnais
		However, the Kent succession has considerable palaeontological and lithological similarity to that developed to the west of Oxford, notably in the occurrence of rocks that may equate with the sandy facies of the Chipping Norton Formation, the Hampen Marly Formation and the White Limestone Formation (Lamplugh et al, 1923; Arkell, 1933; Cope et al, 1980).
		The interval between these nodule beds may correspond to the highest of the organic-rich beds in the British sequence (huddlestoni-pectinatus zones), for which there is no ammonite evidence.
		In the Boulonnais, the Kellaways Formation is represented only by a thin unit (up to 5 m, but typically much less) of ferruginous oolitic marls, the Marnes ferrugineuses de Belle, with a rich bivalve and ammonite fauna including Sigaloceras calloviense.
	www.geologyshop.co.uk /geolkb.htm (155 words)

	New constraint on the maintenance of Mn nodules at the sediment surface
		Hecker, B. and Paul, A. in Marine Geology and Oceanography of the Pacific Manganese Nodule Province (eds Bischoff, J. and Piper, D. Z.) 287 (Plenum, New York, 1979).
		Investigations into the association of manganese nodules with pelagic sediment in many areas of the deep ocean have mainly considered either (1) the source of metals in nodules, or (2) the occurrence of nodules predominantly at the sediment surface.
		The mechanisms previously proposed have failed to consider that nodules retain their orientation at the sediment surface for several hundred-thousand years, during which time several tens of centimetres of sediment are fluxed down beneath them.
	www.nature.com /nature/journal/v286/n5776/abs/286880a0.html (385 words)

	David Piper: bibliography of publications
		Iki, T.R. and Piper, D.Z., 1989, Seafloor coverage of manganese nodules in the Pacific Ocean: 28th International Geology Congress, Abstracts.
		Piper, D.Z. and Swint, T., 1984, Distribution of manganese nodules in the Pacific: 27th In-ternational Geological Congress, Abstracts, v.
		Piper, D.Z. and Blueford, J.R., 1982, The distribution, mineralogy, and texture of manganese nodules and their relation to sedimentation at DOMES Site A in the equatorial North Pacific: Deep Sea Research, v.
	minerals.usgs.gov /west/menlo/piperpub.shtml (2990 words)

	Jurassic, Lyme Regis to Charmouth - Guide, Geology of the Wessex Coast (Jurassic Coast, World Heritage Site).
		The Obtusum Zone in which it occurs is a specially interesting unit, though, and in the Mendip area is represented by the Obtusum Nodule Bed, which rests on various lower zones in different places and contains fossils derived from their denudation; it is, in fact, a remanie bed (Arkell, 1933).
		The level of the Jurassic sea-floor fluctuated with basins and swells developed and irregular phases on swells where the seafloor did not subside and shoals and exposed surfaces developed Sellwood and Jenkyns (1975).
		These logs of parts of the Black Ven Marls are intended to help the understanding of just Scelidosaurus seems to occur only at one horizon.
	www.soton.ac.uk /~imw/lymchar.htm (2990 words)

	Geology at Spelthorne Museum
		SMCC > Collections > Geology > Spelthorne Museum
		There is also a large piece of septarian nodule enclosing a fragment of fossil wood from the local London Clay.
		Governing body: Spelthorne Archaeological Field Group and Staines Museum Trust
	www.surreymuseums.org.uk /collections/geology/geo3.html (88 words)

	Geology of Yellowcraig: storm beach
		Radial cracks around a peridotite nodule in basanite.
		The pale 'sunspot' texture in the basanite is due to the presence of feldspathoids.
		The storm beach East of Marine Villa consists of boulders of varied provenance, including many of basanite from nearby Fidra.
	www.geos.ed.ac.uk /undergraduate/geolsoc/field/yellowcraig/Beach.html (88 words)

	Thorncombe Beacon - Geological Guide for the Geology and Stratification
		At the base of the cliff at Thorncombe Beacon is the Eype clay, in the middle is a series of Nodules from the 'Eype Nodule Bed', though this is often covered by slippages.
		Thorncombe Beacon - Geological Guide for the Geology and Stratification
		Thorncombe Beacon is 157m high, right at the top is the Late Greensand and Gault from the Cretaceous Period and below this the Bridport Sands, Down Cliff Clay and Thorncombe Sands which are not present at Golden Cap.
	www.thorncombe.ukfossils.co.uk /Thorncombe-Fossils-Geology/geology-guide.htm (88 words)

	NGDC/WDC MGG, Boulder-Scripps Inst of Oceanography Ferromanganese Nodule Analysis File
		Sample-by-sample inventory information for all data, regardless of format available from NGDC are fully searchable through the marine geology inventory (GEOLIN).
		The Scripps Institution of Oceanography compiled data on the geochemistry of marine ferromanganese nodules as part of the International Decade of Ocean Exploration, funded by the National Science Foundation.
		NGDC/WDC MGG, Boulder-Scripps Inst of Oceanography Ferromanganese Nodule Analysis File
	www.ngdc.noaa.gov /mgg/geology/sionar.html (88 words)

	David Piper: bibliography of publications
		Piper, D.Z., Cook, H.E., and Gardner, J.V., 1979, Lithic and acoustic stratigraphy of the equatorial North Pacific, in Bischoff, J.L., and Piper, D.Z., eds., Marine Geology and Oceanography of the Pacific Ocean Manganese Nodule Province: Plenum Press, New York, p.
		Piper, D.Z., 1988, The metal oxide fraction of pelagic sediment in the equatorial North Pacific Ocean: A source of metals in ferromanganese nodules: Geochimica et Cosmo-chimica Acta, v.
		Piper, D.Z., McCoy, F.W., and Swint, T.R., 1986, Manganese nodules, seafloor sediment, and sedimentation rates of the Circum-Pacific region: Circum-Pacific Map Project, American Association of Petroleum Geologists, Tulsa, Okla., 1 sheet, scale 1:17,000,000.
	minerals.usgs.gov /west/menlo/piperpub.shtml (2990 words)

	The Geology of the Market Weighton By pass
		8, page 26) Judith Bryce found a specimen of Dactylioceras tenuicostatum (specimen no. DB1990.8.82), preserved in an ironstone nodule from the blue and brown clays beneath the Red Chalk (NGR SE889415), suggesting an early Toarcian date for these beds.
		Many thanks are due to Humberside County Council who allowed access to the roadworks and provided Lynden Emery with details of shallow borings and trial pits made along the route of the by pass; Prof.
		Judith Bryce who found the Dactylioceras specimen and donated it to Hull Museum; and Mike Boyd who provided the Hull Museum accession numbers.
	www.fortunecity.com /greenfield/ecolodge/25/mwbpass.htm (2990 words)

	Lyme Regis, West - Geology of the Wessex Coast.
		The student is looking at an early concretionary carbonate nodule (is it the result of input of carbonate from the sea floor or of unmixing?) in cyclical calcareous shale/ bituminous shale sequences.
		In addition, the breakup of the old supercontinent Pangaea led to an increase in the number of spreading centres in the oceans (Lemon, 1993).
		The Blue Lias rises in the cliffs in a westward direction so that entering Pinhay Bay there is a high cliff with an obvious difference between the thicker- bedded parts of the Blue Lias, already seen, and the thinner-bedded lower part.
	www.soton.ac.uk /~imw/lyme.htm (5837 words)

	Geology of Kent and the Boulonnais
		The interval between these nodule beds may correspond to the highest of the organic-rich beds in the British sequence (huddlestoni-pectinatus zones), for which there is no ammonite evidence.
		Nearer to the margin of the basin, the Atherfield Clay at Harmansole is reduced to 0.6 m of unfossiliferous sandy clay with phosphatic pebbles.
		The base of the Aptian in the Weald Basin is inferred to lie within the Weald Clay, by extrapolation from the Isle of Wight; where the early Aptian Vectis Magnetozone is situated within the correlative Vectis Formation (Kerth and Hailwood, 1988).
	www.geologyshop.co.uk /geolkb.htm (5837 words)

	EvC Forum: Geology Glossary
		A hollow nodule of rock lined with crystals; when separated from the rock body by weathering, it appears as a hollow, rounded shell partly filled with crystals.
		Andesitic magma is believed to originate from fractionation of partially melted basalt.
		The line formed by the intersection of the axial plane with the bedding surface.
	www.evcforum.net /WebPages/Glossary_Geology.html (5837 words)

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