Mary McGann
Research Geologist at the USGS Pacific Coastal and Marine Science Center
Science and Products
Filter Total Items: 64
Ventilation changes in the northeast Pacific during the last deglaciation
Under present climate conditions, convection at high latitudes of the North Pacific is restricted to shallower depths than in the North Atlantic. To what extent this asymmetry between the two ocean basins was maintained over the past 20 kyr is poorly known because there are few unambiguous proxy records of ventilation from the North Pacific. We present new data for two sediment cores from the Cali
Authors
A. VanGeen, R.G. Fairbanks, P. Dartnell, M. McGann, J.V. Gardner, Michaele Kashgarian
Recent introduction of the foraminifer Trochammina hadai Uchio into San Francisco Bay, California, USA
[No abstract available]
Authors
M. McGann, D. Sloan
Age and correlation of the Calera Limestone in the Permanente terrane of northern California
Planktonic foraminifers indicate that outcrops of Calera Limestone from the Permanente terrane in the Franciscan Complex of northern California range in age from possibly as old as Barremian to late Turonian. Underlying black limestone, which is devoid of planktonic foraminifers, presumably is Barremian in age or older. The top of the sequence exposed in major quarries is always faulted. Improved
Authors
William V. Sliter, Mary McGann
Paleoenvironmental analysis of latest Quaternary levee deposits of Monterey Fan, Central California Continental margin : foraminifers and pollen, Core S3-15G
No abstract available.
Authors
Mary McGann
Science and Products
Filter Total Items: 64
Ventilation changes in the northeast Pacific during the last deglaciation
Under present climate conditions, convection at high latitudes of the North Pacific is restricted to shallower depths than in the North Atlantic. To what extent this asymmetry between the two ocean basins was maintained over the past 20 kyr is poorly known because there are few unambiguous proxy records of ventilation from the North Pacific. We present new data for two sediment cores from the Cali
Authors
A. VanGeen, R.G. Fairbanks, P. Dartnell, M. McGann, J.V. Gardner, Michaele Kashgarian
Recent introduction of the foraminifer Trochammina hadai Uchio into San Francisco Bay, California, USA
[No abstract available]
Authors
M. McGann, D. Sloan
Age and correlation of the Calera Limestone in the Permanente terrane of northern California
Planktonic foraminifers indicate that outcrops of Calera Limestone from the Permanente terrane in the Franciscan Complex of northern California range in age from possibly as old as Barremian to late Turonian. Underlying black limestone, which is devoid of planktonic foraminifers, presumably is Barremian in age or older. The top of the sequence exposed in major quarries is always faulted. Improved
Authors
William V. Sliter, Mary McGann
Paleoenvironmental analysis of latest Quaternary levee deposits of Monterey Fan, Central California Continental margin : foraminifers and pollen, Core S3-15G
No abstract available.
Authors
Mary McGann