(W 112⁰22ʹ30ʺ--W 112⁰15ʹ00ʺ/N 40⁰22ʹ30ʺ--N 40⁰15ʹ00ʺ)., (W 112⁰15ʹ00ʺ--W 112⁰07ʹ30ʺ/N 40⁰22ʹ30ʺ--N 40⁰15ʹ00ʺ).
Relief shown by contours and spot heights.
Text and header have title: Preliminary geologic maps, cross sections, and explanation pamphlet for the Ophir and Mercur 7 1/2-minute quadrangles, Utah.
Includes text, bibliographical references, geologic cross sections, and quadrangle location map.