Showing papers by "Philip A. Meyers published in 1982"
TL;DR: This paper analyzed the organic compounds extractable with dichloromethane in rain and snow samples collected over an 8-month period in southern Indiana and found that straightchain fatty acids and hydrocarbons from biological sources dominate the compositions and these show only minor seasonal changes.
62 citations
TL;DR: The results of these studies are generally consistent with those of Lake Michigan surface films as discussed by the authors, and their relative contributions vary considerably but provide more information about surface/subsurface fractionation, and evidence of aquatic, terrigenous and eolian sources is preserved in microlayer components.
35 citations
National Center for Atmospheric Research1, Scripps Institution of Oceanography2, University of Bristol3, United States Geological Survey4, University of Hawaii at Manoa5, University of Texas at Arlington6, University of Michigan7, University of Hamburg8, University of South Florida St. Petersburg9, University of Edinburgh10, Geological Survey of Austria11
TL;DR: In the Upper Cretaceous section, more than 200 beds of gray or black shale and mudstone rich in organic carbon (as much as 18%) are intercalated within a sequence of red and green mudstones that contain less than 1% organic carbon as mentioned in this paper.
Abstract: Leg 75 investigated two periods of accumulation of sediments rich in organic matter. In the Upper Cretaceous section, more than 200 beds of gray or black shale and mudstone rich in organic carbon (as much as 18%) are intercalated within a sequence of red and green mudstones that contain less than 1% organic carbon. The black shale beds are 1 to 62 cm thick and constitute less than 10% of the section in the 20 cores in which they were recovered. Both turbiditic and pelagic processes were involved in the deposition of these black shale beds. A combination of factors, including increased productivity and warm saline bottom waters, probably resulted in a delicate balance between oxic and anoxic conditions that periodically favored the accumulation and preservation of organic matter in the basinal sediments. The Pliocene-Pleistocene sediments are thoroughly bioturbated, and there is no evidence of persisting anoxia in the overlying water in spite of the high organic carbon content of the sediments. These two different periods of accumulation of organic matter both resulted in significant concentration of organic carbon (>2%, maximum 18%), but the Pliocene-Pleistocene sediments contain the greater mass of organic carbon per unit volume of the solid sediment.
28 citations