Description: Broadway's Dreamers: The Legacy of the Group Theatre, from "American Masters", Theatre Game #39 - Group Walk, Federal Theatre and Group Theater: Crash Course Theater #42, Dança de sombras - Shadow Theatre Group
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Group may refer to:
A stratigraphic unit is a volume of rock of identifiable origin and relative age range that is defined by the distinctive and dominant, easily mapped and recognizable petrographic , lithologic or paleontologic features ( facies ) that characterize it.
Units must be mappable and distinct from one another, but the contact need not be particularly distinct. For instance, a unit may be defined by terms such as "when the sandstone component exceeds 75%".