FIG. 3 in The late Givetian (Middle Devonian) ammonoid Epitornoceras Frech, 1902 from Argentina (southwestern Gondwana)

FIG. 3. — The Chavela Creek: A, B, structural cross-section of the Chavela Creek, showing the tectonic relation between the Chigua and Pircas Negras formations, and the angular unconformity from the overlying Malimán Formation (Mississippian); arrows point towards younger deposits; the white box (in A) indicates the location of pictures C and D; C, overturned psammitic beds, younger deposits towards the East; D, Ichnofossils indicating the base of beds.