By R. A. Scrutton
About The Product
Published by way of the yankee Geophysical Union as a part of the Geodynamics Series.
The contributions to this quantity were geared up into 3 elements reflecting the 3 pronged method of the research of passive continental margins that has been made throughout the foreign Geodynamics venture. the 1st half comprises six papers facing the information from many of the passive margins. those observational facts are crucial for checking out of hypotheses in regards to the evolution of this kind of margin. typically multi?]channel seismic mirrored image information are considered as offering crucial info on structural stipulations and evolution of continental margins. but it is perhaps both vital from the perspective of realizing the geodynamics concerned that there must have been deep crustal reports of not less than a few of the margins. spotting that geophysical reviews convey in simple terms the constitution because it is at the present time recourse needs to be made to stratigraphic stories to be able to receive courses to the prior improvement of the margins. The papers partially One hide these types of elements of passive margin improvement.
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In regards to the ProductPublished by means of the yankee Geophysical Union as a part of the Geophysical Monograph sequence. content material:
Additional resources for Dynamics of Passive Margins
Copyright American Geophysical Union EUROPE AND E. GREENLAND 37 Geodynamics Series Dynamics of Passive Margins Vol. J- J_ J_ Fau•t ß ß ß ß • Hornsund Fau•t ..... KmpovlchEscarpment • Limitof fuzzy reflector ....... Limit low velocity sediments • Depocenter low vetocdy 78 ø Ji • 77 ø D 76 ø _ -t- + _ •% 1912( _ O* Fig. 6. shift older which elevated 5ø 10' 15ø is somewhat uncertain, but is perhaps no than 5-6 my (Eldholm and Sundvor, 1980) is the time required to generate the block. 79øN(Figs. 6,7).
Tran- A tran- -72 ø seaward of the shelf edgehas been suggestedby SchlHter and Hinz (1978) north of 77-N. We stress, however, that they base their interpretation on the assumption that the smooth apparent basement reflector landward of the Knipovicb Escarpment does indeed represent oceanic crust. 69 ø prominent elongate shelf gravity anomaly, but in the north there is no such anomaly along the seismic expression of the fault. There is also a slight but well-defined angle between the anomaly trend and the fault, but the relationship between these features has not yet beem explained.
The continental slope becomes progressively narrower northwards and the shelf is underlain by high-velocity sediments at,the sea floor. It appears that the Tertiary and part of the Mesozoic sedimentary sequence is missing on the shelf, possibly reflecting an area that 32 ELDHoLMAND are graben later Cimmmerian unconformity (2) changes in the velocity-depth of indications basins of in the than the mid-Cretaceous forming the basins and ridges shown in Fig. 2. The structural elements on the shelf in Fig.