. Collected reprints / Atlantic Oceanographic and Meteorological Laboratories [and] Pacific Oceanographic Laboratories. Oceanography MACLENNAN. SECTION Figure 3: The Sudbury lopolith showing the distribution of the sub-layer (in black) along the margin of the Irruptive and in radial fractures ("offsets"). Diagonal ruling shows the extent of more highly metamorphosed and tectonically disturbed rock associated with the South Range. This metamorphic aureole extends northward from the nearby Grenville front (Souch and Podolsky, 1969). fifty known sulphide occurrences. This
. Collected reprints / Atlantic Oceanographic and Meteorological Laboratories [and] Pacific Oceanographic Laboratories. Oceanography MACLENNAN. SECTION Figure 3: The Sudbury lopolith showing the distribution of the sub-layer (in black) along the margin of the Irruptive and in radial fractures ("offsets"). Diagonal ruling shows the extent of more highly metamorphosed and tectonically disturbed rock associated with the South Range. This metamorphic aureole extends northward from the nearby Grenville front (Souch and Podolsky, 1969). fifty known sulphide occurrences. This may possibly mean that the bolide arrived from the north so that its substance was preferentially splashed against the south wall. Secondly, one wonders if the common mafic and ultramafic xenoliths which are not traceable to known formations could be preserved fragments of the cosmic bolide, and hence "cosmoliths"? By reflection and interference of shock waves along the rear margin of an impacting bolide, fragments may escape shock destruction. This effect apparently explains the preservation of unshocked fragments of the Canyon Diablo meteorite, which created the Barringer (Meteor) Crater in Arizona (Anders, 1965). However, the wide variety of these rock types at Sudbury argiiesagainst this possiblity and makes the deep-crust source more likely. Also, Sidney Pollack (personal communication) has been unable to find any stacking disorder in their orthopyroxenes such as is found in some meteoritic pyroxenes in chondrites. HYPERVELOCITY AND CENTRIFUGAL INJECTION By the proposed impact model, the sub-layer would be emplaced at hypervelocity and injected centrifugally with respect to ground zero — the centre of the Sudbury Basin. Distribution of the sub-layer components would reflect inertial or density differences and would not be appreciably influenced by the gravitational field. Both theory and small-scale experiments show that hypervelocity bolides traveling many kil
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