Coseismic Base-level Changes Figure 5. Erect, standing regenerated calamitean axiswith secondary roots crosscutting tidalite sediments. (A) Standing axis at Coal Systems, Inc., Lost Creek mine (T13S, R9W, Sec. 33/38, U.S. Geological Survey, Nauvoo, Alabama 7.5-ft quadrangle; Demko and Gastaldo, 1992) with secondary rooting structures indicated at arrows, originating from the nodes of the aerial axis. Scale is 10 cm(3.9 in.).
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Erect Forests Are Evidence for Coseismic Base-level Changes in Pennsylvanian Cyclothems of the Black Warrior Basin, U.S.A.

Robert A. Gastaldo
Department of Geology, Colby College, Waterville, Maine, U.S.A.

Ivana Stevanovic¸-Walls
Department of Earth and Environmental Science, University of Pennsylvania, Philadelphia, Pennsylvania, U.S.A.

William N. Ware 1109 Wynterhall Land, Dunwoody, Georgia, U.S.A.