Petrographic and geochemical comparisons between the lower crystalline basement-derived section and the granite megablock and amphibolite megablock of the Eyreville B core, Chesapeake Bay impact structure, USA - Townsend, Gabrielle; Gibson, Roger; Horton Jr., J. Wright; Reimold, Wolf; Schmitt, Ralf; Bartosova, Katerina (Special Paper of the Geological Society of America, 2009)