Figure from Cambrian magmatic rocks of the Ellsworth Mountains,West Antarctica

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Figure 2. Tectono-stratigraphic column of the Heritage and Crashsite (CG) groups in the northern Heritage Range of the Ellsworth Mountains. Symbols within column are standard lithological notation. * represents level of faunal collections. Faulted contacts indicated by bold lines with arrows. Abbreviations along right side indicate in ascending order: late Early Cambrian, early Middle Cambrian, late Middle Cambrian, early Late Cambrian. Ages are U/Pb zircon dates from volcanic rocks in the Union Glacier Formation and a sills and dikes intruding the Springer Peak Formation. (Ma denotes million years.)