Bryn Mawr College
Department of Geology
Bryn Mawr, PA 19010
Office Location: 159 Park Science Building
Mineralogy, igneous and metamorphic petrology, and Tectonics
My research in crystalline rocks, both igneous and metamorphic, emphasizes the field relations, mineralogy, and chemical compositions of these rocks. In southeastern Pennsylvania I study the geological history of the complex Precambrian and lower Paleozoic crystalline rocks in the Honey Brook/Mine Ridge area. Another research focus is the collection of suites of igneous rocks in southeastern Alaska for petrographic study and chemical analysis to determine the nature of the magma involved in particular igneous events. The petrographic and geochemical studies are performed using a petrographic microscope, an x-ray diffractometer, computers to manipulate the data, and wet chemical techniques.
Crawford, W. A. and Hoersch, A. L. 1984, The Geology of the Honey Brook Upland. Geological Society of America, Special Paper 194, p. 111-125.
Crawford, W. A. and Valley, J. W., 1990, Origin of graphite in the Pickering gneiss and the Franklin marble, Honey Brook Upland, Pennsylvania Piedmont. Geological Society of America Bulletin, v. 103, p. 829-841.
Lindline Jennifer, Crawford, William A., Crawford, Maria Luisa, and Omar, Goma I., 2000, Post-accretionary magmatism within the Kuiu-Etolin igneous belt, southeastern Alaska, Canadian Mineralogist, v. 38. p. 951-974.
Lindline, J., Crawford, W.A., and Crawford, M.L., 2004, Bimodal volcanic-plutonic system: the Zarembo Island extrusive suite and the Burnett Inlet intrusive complex. Canadian Journal of Earth Science, v. 41. p. 355-375.
Crawford, M.L. Crawford, W.A., and Lindline, J., 2005, 105 Million years of igneous activity, Wrangell, Alaska, to Prince Rupert, British Columbia. Canadian Journal of Earth Science,The Lithoprobe Slave-Northern Cordillera Lithospheric Evolution (SNORCLE) transect v.42, p. 1097-1116.