Zobrazeno 1 - 9
of 9
pro vyhledávání: '"A. J Nalwalk"'
Publikováno v:
Geophysical Research Letters. 1:355-358
A manganese oxide crust from an extensive deposit in the median valley of the Mid-Atlantic Ridge was found to be unusually high in manganese (up to 39.4% Mn), low in Fe (as low as .01% Fe), low in trace metals and deficient in Th230 and Pa231 with re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::99599e7cc4936a4cb161ace60aeb6fec
https://doi.org/10.1029/gl001i008p00355
https://doi.org/10.1029/gl001i008p00355
Publikováno v:
Energy Sources. 1:179-187
Inorganic minerals in coals can be identified advantageously if they are concentrated by removal of the organic matter of the coal. The concentrating method involves the use of 30–35% hydrogen peroxide. Several days of treatment with this reagent a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::641405cfd3910dc0a747c13b78ab8518
https://doi.org/10.1080/00908317408945919
https://doi.org/10.1080/00908317408945919
Publikováno v:
Geophysical Research Letters. 1:55-57
The semi-enclosed nature of Long Island Sound makes it ideal for surface and sea-bed drifter studies. A U.S. Coast Guard H-3 helicopter provided a “synoptic” launch within a half tidal cycle. Drifter releases were conducted on 18 June 1973 at a t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::23658ba59bd1438c3d57aeee13b1ee0b
https://doi.org/10.1029/gl001i001p00055
https://doi.org/10.1029/gl001i001p00055
Autor:
R. A. Friedel, A. J. Nalwalk
Publikováno v:
Nature. 217:345-347
SAMPLES of two types of rocks containing organic material were collected from 65° 41′ 24″ W., 20° 15′ 58″ N. during a cruise of the R.V. Chain of the Woods Hole Oceanographic Institution to the north wall of the Puerto Rico Trench (Fig. 1).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f4001142079abecba397293297451612
https://doi.org/10.1038/217345a0
https://doi.org/10.1038/217345a0
Publikováno v:
Nature Physical Science. 239:77-79
Summaries of the transition element chemistry of oceanic ferro-manganese deposits report compositional trends related to water depth and to geographic proximity to continental margins1–4. Explanations of compositional variations include continental
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6068c96156614b787f8e1ec11818dc75
https://doi.org/10.1038/physci239077a0
https://doi.org/10.1038/physci239077a0
Autor:
Andrew J. Nalwalk, J. Leslie Goodier
Publikováno v:
All Days.
ABSTRACT This paper describes the efforts of one of the twenty-three coastal states to assess the types, quantity, and economic quality of minerals that have accumulated in the unexplored underwater land area owned and controlled by the state. It des
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ab5c441a84fa3a33793d7dc5dc54b00c
https://doi.org/10.4043/1028-ms
https://doi.org/10.4043/1028-ms
Publikováno v:
Geological Society of America Bulletin. 87:661
An asymmetric tectonic fabric was delineated by narrow-beam bathymetric profiles in a 180-km 2 area of the Mid-Atlantic Ridge crest at lat 26°N. Features of the tectonic fabric are a continuous rift valley offset by small ( The rift valley has a dou
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0ff7d3689ea546a2d7048724caceaf63
https://doi.org/10.1130/0016-7606(1976)87<661:tfahao>2.0.co
https://doi.org/10.1130/0016-7606(1976)87<661:tfahao>2.0.co
Publikováno v:
Geological Society of America Bulletin. 77:257
Three dredge hauls from the north wall of the Puerto Rico Trench near 66° 30′ W. contained serpentinized peridotite and talc rock, sedimentary rocks of Cretaceous and Tertiary age, and minor basalt. A possible stratigraphy of the main scarp is giv
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7f242f18c24cdf1c4b09e82d4c960c5a
https://doi.org/10.1130/0016-7606(1966)77[257:spftnw]2.0.co
https://doi.org/10.1130/0016-7606(1966)77[257:spftnw]2.0.co
Autor:
Peter A. Rona, Andrew J. Nalwalk
Publikováno v:
Geological Society of America Bulletin. 81:2117
A major unconformity is exposed along the west coast of the Island of Fuerteventura in the eastern Canary Islands. Radiogenic dates from sub-vertical stratiform rocks of basaltic composition underlying the surface of unconformity range at least from
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::926168bc3b5f530b1eb43563bc8f9773
https://doi.org/10.1130/0016-7606(1970)81[2117:ppuofc]2.0.co
https://doi.org/10.1130/0016-7606(1970)81[2117:ppuofc]2.0.co