ISSN:
1432-0495
Schlagwort(e):
Key words Organic carbon
;
n-Alkanes
;
Petroleum residues
;
Sediments
;
Lake Ontario
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Geologie und Paläontologie
Notizen:
Abstract The amounts and types of extractable hydrocarbon components in sediment cores from the Rochester Basin of eastern Lake Ontario provide a record of environmental changes that have accompanied the settlement and population growth of the surrounding land areas. Sediments deposited prior to the mid-1800s contain low concentrations of hydrocarbons that are dominated by land-plant wax components. Concentrations begin to rise in the late 1800s as erosion of soil and nutrients from watershed areas accelerated. This pattern continues into modern times. Episodes of enhanced aquatic productivity are sometimes recorded in twentieth-century sediments by the dominance of algal hydrocarbons, but land-plant components typically predominate. Petroleum residues begin to appear in sediments deposited in the late 1800's but remain minor constituents of the hydrocarbon contents of modern sediments in the Rochester Basin.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/s002540050074
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