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Source of the Australasian tektite strewn field - A possible off-shore impact siteAlthough there is a preponderance of evidence that tektites were formed by asteroid impacts on the earth, no source crater has been found for the largest and youngest of the strewn fields - the Austalasian strewn field. A combined Seasat/Geos 3 altimeter data set of sea surface heights in the northern portion of the Australasian strewn field has been examined for negative gravity anomalies on the continental shelf and slope which might be related to the source crater for these tektites. A large negative anomaly called the Qui Nhon Slope Anomaly is a sea surface depression of approximately 1.5 meters over an area of 100 km diameter. It corresponds to a gravity anomaly of about -50 mgal. It is proposed that this anomaly may be due to the impact structure that produced the Australasian strewn field.
Document ID
19880044566
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Schnetzler, C. C.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Walter, L. S.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Marsh, J. G.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 13, 2013
Publication Date
April 1, 1988
Publication Information
Publication: Geophysical Research Letters
Volume: 15
ISSN: 0094-8276
Subject Category
Lunar And Planetary Exploration
Accession Number
88A31793
Distribution Limits
Public
Copyright
Other

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