Isotopes and geology

Tracking natal origins of salmon using isotopes, otoliths, and landscape geology

The inability to identify natal origins (i.e., individual rivers and hatcheries) of adult Pacific salmon in the ocean has impeded our understanding of their ocean ecology and the management of mixed-stock fisheries. Strontium isotope (87Sr : 86Sr) ratios recorded in otoliths of fall-run Chinook salmon (Oncorhynchus tshawytscha) from all major natural and hatchery spawning sites in the Californi...

Environmental Geology and Planning

Geology and geomorphology of Turkmenistan: A review

This article provides a background for scientists interested in a general overview of the geology and geomorphology of Turkmenistan. The basement of Turkmenistan is a complex amalgamation of arc-related terranes developed in the Asiatic and northern Paleotethys oceanic domains during Late Paleozoic to Triassic times. A major part of the country coincides with the Turan Platform, where a thick s...

Coal Geology and Geochemistry

Marine Geology

To constrain the timing of rifting in the western, eastern, and northern parts of the Alboran Sea basin, seismic reflectors, corresponding to biostratigraphic boundaries and unconformities from the Miocene to Recent, are correlated using synthetic seismograms. Regions of adjacent coeval compression and extension are found in the Alboran Sea basin. Normal faulting continues in parts of the easte...