File:Image from page 323 of "The Earth beneath the sea - History" (1963).jpg

English: Title: The Earth beneath the sea : History

Identifier: earthbeneathseah00hill Year: 1963 (1960s) Authors: Hill, M. N. (Maurice Neville), 1919- Subjects: Ocean bottom; Marine geophysics Publisher: New York : Interscience Pub. Contributing Library: MBLWHOI Library Digitizing Sponsor: MBLWHOI Library

View Book Page: Book Viewer About This Book: Catalog Entry View All Images: All Images From Book

Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image: 298 GUILCHER [chap. 13 predominantly marine and range from Cambrian to Pleistocene. Post- Carboniferous rocks seem to outcrop only in the Carnarvon and Perth basins. It seems that corres])ondin'^/:-' INDIAN Ashmore Reef,-,'-)'--""-'t-0; BONAI^ARTE r&c GULF DEPRESSION / BROWSE~-.^^>^ ^^ ..,

Text Appearing After Image: OCEAN /^DEPRESSION/ / , ^ /l'^/"^-^ Ri nrK BONAPARTE v<- ROWLEY t.^\\^ -\X / / /GULRiiBASIN "^"J"'Rowley' /:::::::\ ff::::oVv ^\^ / I i I'-'â 'â â 'â\ 4, ©Atolls \ h;:;:;:;:;i!^:;:;:;:;;i^§^^^ y tW^:"^ ^ "' DEPRESSION li:;:i:::;i;:!:i:;:;:::;:;:;iI?inTf5^, Y V^y-^M /:>.^'^ -⢠PILBARA V i^V VVBLOCK IO°S 120° E 125° Fig. 9. Relationshiias between geotectonic units on continent and on shelf in North-west Australia. (Simplified from Fairbridge, 1953.) Maximum thicknesses in feet of sedi- mentary rocks in Canning Basin and in Bonaparte Gulf Basin, from Teichert (1958). be available about the thickness of the sedimentary column on the shelves, and the gravimetric observations by Vening Meinesz are not very conclusive here, except for the Rottnest shelf off Perth basin where an anomaly of -140 mgals has been observed. A subsidence is supposed in depressions from bathymetric data, esiiecially in the Bona])arte and Ro\\'ley depressions A\here the shelf is as deep as .'JOO fmâa fairly unusual figure. In this north-western region, it may be that sedimentation has not been able, everywhere at least, to keep pace with subsidence (Tertiary rocks are not reported from the Canning and Bonaparte basins); the downwaqiing, however, has been slow enough to allow coral reefs to grow as far as the edge of the shelf (Teichert and Fairbridge, 1948). Further to the south, off the Carnarvon and Perth basins, where the shelf is narrower.

Note About Images

Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.