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| Biren, M. B., Wartho, J.โA., Soest, M. C., Hodges, K. V., Cathey, H., Glass, B. P., Koeberl, C., Horton, J. W., Hale, W. (2019) (UโTh)/He zircon dating of Chesapeake Bay distal impact ejecta from ODP site 1073. Meteoritics & Planetary Science, 54 (8) 1840-1852 doi:10.1111/maps.13316 | Journal (article/letter/editorial) | | 1โ13 (2019)
doi: 10.1111/maps.13316
(U-Th)/He zircon dating of Chesapeake Bay distal impact ejecta from...(U-Th)/He dating has been undertaken on 21 detrital zircon grains
extracted from a core sample from Ocean...energy dispersive X-ray microanalysis (EDS) of zircon
grains from this late Eocene sediment shows clear...shock metamorphism in some
zircon grains, which suggests that these shocked zircon crystals are distal ejecta...Chesapeake Bay impact structure. (U-Th/He) dates for
zircon crystals from this sediment range from 33.49 | ๐ Image
| | Report (issue) | | Series: A quenchable high-pressure polymorph of zircon.
Occurrence: Epitaxially oriented in shock-metamorphosed...Drilling Project Site 1073 Hole A).
On Barbados at Bath Cliff. From numerous impact structures, including...Reidite: An impact-produced highpressure polymorph of zircon found in marine sediments Amer. Mineral., 87, 562-565...Mihailova, and M. Alvaro (2019) New insights into
the zircon-reidite phase transition. Amer. Mineral., 104,...(2015) Precambrian reidite discovered in shocked
zircon from the Stac Fada impactite, Scotland. Geology | ๐ Image
| | Journal (article/letter/editorial) | | Reidite: An impact-produced high-pressure polymorph of zircon found in
marine sediments
BILLY P. GLASS,* SHAOBIN...ABSTRACT
Reidite is a high-pressure polymorph of zircon with the scheelite structure. It has been found...upper continental slope off New
Jersey and on Barbados. Reidite occurs (epitaxially oriented) in shock-metamorphosed...fluoresce. In index oil in transmitted light, shocked
zircon grains consisting almost entirely of reidite are...INTRODUCTION
While documenting shock effects in zircon grains recovered from an impact ejecta layer found | ๐ Image
| | Journal (article/letter/editorial) | | Caribbean Sea,
northwestern Atlantic Ocean and on Barbados. Unmelted impact ejecta (including
shocked quartz...stishovite, and reidite, a high-pressure polymorph of zircon) have been found associated
with this microtektite...in the Gulf of Mexico (Glass and Zwart, 1979), Barbados (Saunders et al., 1984; Sanfilippo et al., 1985)...coesite, stishovite, and a
high-pressure polymorph of zircon) have been found associated with the North American...microtektites in the Caribbean Sea and Gulf of Mexico (John and Glass, 1974).
At this time they were thought | ๐ Image
| | Journal (article/letter/editorial) | | cmmqc@qcvaxa.acc.qc.edu
Sea, Gulf of Mexico, Barbados, and New Jersey; and
(2) the equatorial Pacific...to the North American strewn field, Bath
Cliff section of Barbados, 40 Ar=39 Ar 35:4 ลก 0:6 Ma
[16].
The...City and Island Beach sites): rutile,
ilmenite, zircon, monazite. Rutile, in the conglomerate clast, shows...al. [25] as an
explanation. The New Jersey and Barbados tektites
contained a total volatile content 0...These results indicate
that at least for the Barbados tektites high volatiles
are a possible explanation | ๐ Image
| | Book | | A COSMIC PARADOX
HAL POVENMIRE
1997
Edited by
JOHN A. O'KEEFE
Dedication
~. I L ~ ~
i~ '
~~
ยฅ......................................... 16
The Barbados Microtektites ........................................................... 54
Interview With Dr. John A. O'Keefe ................................................................................... 72
John O'Keefe Replies To Billy Glass .................................... 75
Billy Glass Makes Reply To John O'Keefe 11 ............................. 80
References | ๐ Image
| | Book | | O'Brien,
Barry Irwin, Dave Nichols, Jeremy Loss, John Evans, and Nancy Soderberg, who
constituted the...Seaward Explorer (1996). Texaco, Inc. (particularly Parish Erwin)
contributed the multichannel seismic reflection...defined the
major features of the crater. Rusty Tirey, John Grow, and Pete Popenoe collected
the early USGS...before we knew the crater was there. Dave
Foster and John Diebold helped to acquire and process the seismic...facilitated
collection of seismic data in Chesapeake Bay. John Costain, Carl Bowin, Larry
Poppe, Warren Agena, | ๐ Image
| | Book | | decomposition products (such as the breakdown of zircon to baddeleyite and silica),
it became possible...Global
Donnelly and Chao (1973), Glass
et al. (1973)
John and Glass (1974), Keller et al.
(1987), Glass and...composition and shape as the original mineral grains. Zircon, for
example, can be thermally decomposed to form...recently
it has been proposed that decomposition of zircon may not be solely the result of
high temperature..., orthorhombic II ZrO2
(Wittmann et al. 2006). Zircon decomposition takes place at a temperature above | ๐ Image
| | Journal (article/letter/editorial) | | This has also been found
in an outcrop at Bath Cliff, Barbados, where it occurs stratigraphically 26
m...impact origin includes shocked
quartz, feldspar, and zircon; shatter cones; fragments in the ejecta layer
up... R.
J. F., Gostin, V. A., Haines, P. W. 1 987.
Zircon age evidence for the late Preยญ
cambrian Acraman...Middle
Eocene to Early Oligocene in the Bath
Cliff section, Barbados, West Indies.
Micropaleontology 30: | ๐ Image
| | Book | | 191
Sphene (titanite)
Staurolite .
Tourmaline
Zircon . .
Iron Oxides
Haematite
Ilmenite .
Limonite
Magnetite...amphiboles and pyroxenes , apatite, monazite , zircon , gypsum,
sanidine, muscovite, quartz, some volcanic...MARINE SEDIMENTS
quartz are monazite, sphene, zircon, anatase , rutile , garnet and
epidote. Some minerals...studies. Some
minerals such as apatite, sphene, zircon, rutile, kyanite and garnet are,
when they occur...minor
amounts in marine sediments. These include zircon tourmaline '
kyanite, sillimanite, rutile , anatase | ๐ Image
| | Report (volume) | | Editorial offices:
Osney Mead, Oxford, OX2 OEL
8 John Street, London, WC1N 2ES
23 Ainslie Place, Edinburgh...Pb/Pb whole-rock isochron methods and the U-Pb zircon method
have been widely applied to dating Precambrian...surmised
(e.g. De Paolo et al. 1982; Humphries & Cliff 1982). The SmNd whole-rock method, however, seems...assemblages. Thus Nunes & Thurston
(1980) reported zircon U-Pb data from three metavolcanic
units in the...recently,
Krogh & Turek (1982) have reported a zircon U-Pb date of
2713.2 _+ 2.e,~.,~Ma from a volcanic | ๐ Image
| | Report (issue) | | Victoria.
Melbourne,
Saint Lawrence Univ. Geol. Inf. and Referral Service Bull. - Saint Lawrence University...tables, 1969.
Aaron, John M. See Drake, Avery Ala, Jr. 02457
064 76
Aaron, John M. Petrology and origin...6, p. 2657B, 1969.
Abel, John F., Jr. See Lee, Fitzhugh T. 03757
Abel, John F., Jr. See Nichols, Thomas...4, p. 130, 1969.
Abruscato,Joseph. See Hassard, John R. 06729
Acaroglu, E. R. See Graf, W. H. 07946
...I, ill us., I969.
Adams, John A. S. See Brimhall, Willis H. 06475
Adams, John A. S. See Civetta, Lucia | ๐ Image
| | Journal (issue) | | Minerals,
Residues and Structural Steel, Rutile
and Zircon Sands
I
II
2 METAL EXCHANGE
LONDON, E.C.3
BUILDINGS...or inferred in the Lesser
Antilles.
Except in Barbados, where they occurred in the Lower to Middle
Eocene...the flanks. These conditions are represented in Barbados
by the Lower and Middle Eocene Scotland formation...Antilles.
The Scotland formation sedimentation of Barbados came to an end and
the deposits were sharply folded...successions are
concerned. The outlying island of Barbados (which does not, however,
belong to the Lesser | ๐ Image
| Harland, W. Brian, Armstrong, Richard L., Cox, Allen V., Craig, Lorraine E., Smith, Alan G., Smith, David G. (1990) A Geologic Time Scale 1989. Cambridge University Press. | Book (edition) | | First published 1990
Printed in Great Britain at The Bath Press, Avon
British Library cataloguing in publication...Cambrian boundary
3.9.3 The Caerfai Epoch
3.9.4 The Saint David's Epoch
3.9.5 The Merioneth Epoch
3.9.6 The...14
9
23
2
13
6
9
4
21
5
7
17
17
7
19
Meriooeth
Saint Davids
60
.
โข
.,,.
Kasunovian
Moscoviao
Bamltlrian...London
(GSL) Working Group (Cowie et al. 1972), i.e. Saint Davids,
etc.
decisively in favour of the Chinese...Meishucunian
?Etcherninian
3.9.4 The Saint David's E poch
Saint D avid 's is the most appropri ate name | ๐ Image
| | Book (edition) | | Zealand
โDeceased,
xii
List of contributors
JOHN MCARTHUR
Institute of Geological Sciences
FREDERIK...Bag 3, Wits 2050
South Africa
London WCIE 6BT
UK
JOHN SHERGOLD
ANDREW H. KNOLL
La Freunie
Department...the current Precambrian time scale.
Luc Lourens, John McArthur, Ed de Mulder, Jurgen Remane,
Paul Renne...and/or help over the many years of book gestation.
John McArthur also checked every section dealing with...Shields, and David Bruton; senior chapter
author John Shergold thanks these contributors.
GTS2004 would | ๐ Image
| | Journal (article/letter/editorial) | | DISCOVERY OF NUCLEAR TRACKS IN INTERPLANETARY DUST
John P. Bradley, Walter C. McCrone Associates, Inc.,...CRITERIA FOR METEORITE IMPACT
Robert S. Dietz and John F. McHone, Department of Geology, Arizona State... NORTH AMERICAN TEKTITES AND MICROTEKTITES FROM BARBADOS, WEST
INDIES
B.P. Glass, C.A. Burns, and D.H....deposits at Bath Cliff, Barbados. Late Eocene microtektites have now been found in
two sites on Barbados: I)...I) Bath Cliff and 2) Gay's Cove. The Barbados microtektites are similar
in appearance and major oxide composition | ๐ Image
| | Report (issue) | | The taxonomic structure ofperiodic extinction
J. John Sepkoski, Jr.
6.
Iridium abundance patterns across...Horton E. Newsom, Gunther Graup, David A. Iseri,
John W. Geissman, and Klaus Keil
23.
Geology, geophysics.... . . . . . . . 263
Curt Covey, Steven J. Ghan, John J. Walton, and
Paul R. Weissman
28.
Atmospheric...Elliott, D. K., ed., Dynamics of extinction: New York,
John Wiley, p. 1 83-229.
, I 986b, Background and mass...Elliott, D. K., ed.,
Dynamics of extinction: New York, John Wiley, p. 107-1 30.
McLaren, D. J., 1 986, Abrupt | ๐ Image
| | Report (volume) | | The Society has its own Publishing House based in Bath, UK. It produces the Society's international journals...Unit 7, Brassmill Enterprise Centre
Brassmill Lane
Bath BA1 3JN, UK
Orders: Tel. +44 (0)1225 445046
Fax...micropalaeontological
datasets has been given by Saint-Marc & Berggren
(1988), Kuhnt & Moullade (1991)...1-79). Geologische
Rundschau, 78(3), 1063-1120.
SAINT-MARC, P. & BERGGREN, W. A. 1988. A
quantitative...C30r-C30n boundary
(Edwards et al. 1999), and in the Saint Stephens
core it first occurs just above the C30r-C30n |
|
