Fig. 3From: A new method to determine volume of bromalites: morphometrics of Lower Permian (Archer City Formation) heteropolar bromalites a Map of Archer County, Texas, USA, showing the location of the Archer City Bone Beds (ACBB). b Geologic map showing the ACBBs set in the Lower Permian Archer City Formation (modified from Hentz 1988; Labandeira and Allen 2007). c Photograph of ACBB V in the foreground facing southwest (arrow indicates southwestern boundary of ACBB III)Back to article page