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Stratigraphy and Microfaunas of the Oquirrh Group in the Southern East ...Tintic Mountains, Utah

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Stratigraphy and Microfaunas of the Oquirrh Group in the Southern East ...Tintic Mountains, Utah Stratigraphy and Microfaunas of the Oquirrh Group in the Southern East ...Tintic Mountains, Utah G E 0 L 0 G I C A L S U R V E Y P R 0 F E S S I 0 N A L P A P E R 1025 Stratigraphy and Microfaunas of the Oquirrh Group in the Southern East rrintic Mountains, Utah By H. T. MORRIS, R. C. DOUGLASS, and R. W. KOPF G E 0 L 0 G I CAL S lJ R V E Y P R 0 FE S S I 0 N A L PAP E R 1025 U N I T E D S T A T E S G 0 V E R N M E N T P R I N T I N G 0 F F I C E , WAS H I N G T 0 N : 1977 UNITED STATES DEPARTMENT OF THE INTERIOR CECIL D. ANDRUS, Secretary GEOLOGICAL SURVEY V. E. McKelvey, Director Library of Congress Cataloging in Publication Data Main en try under title: Morris, Hal Tryon, 1920- Stratigraphy and microfaunas of the Oquirrh Group in the southern East Tintic Mountains, Utah. (Geological Survey Professional Paper 1025) Bibliography: p. 20-22. 1. Geology, Stratigraphic--Pennsylvanian. 2. Geology, Stratigraphic--Permian. 3. Micropaleontology-­ Utah--Tintic Mountains. 4. Geology--Utah--Tintic Mountains. I. Douglass, Raymond Charles, joint author. II. Kopf, Rudolph William. III. Title. IV. Series: United States. Geological Survey. Professional Paper 1025. QE673.M67 551.7'52 77-10492 For -,ale by the Superintendent of Documents, U.S. GoYernment Printing Office \Vashington, D.C. 20402 Stock Number 024-001-0319-5 CONTENTS Page Abstract 1 Introduction -----------------------------------------------------------------------------------------------------------------------------------------------­ 1 Acknowledgments -----------------------------------------------------------------------------------------------------------------------------­ 1 Location ------------------------------------------------------------------------------------------------------------------------------------------------ 2 Designation of the Oquirrh Group -----------------------------------------------------------------------------------------------------­ 2 Type section of the Oquirrh Group -----------------------------------------------------------------------------------------------------­ 2 Oquirrh Group in the southern East Tintic Mountains -------------------------------------------------------------- 3 West Canyon Limestone -----------------------------------------------------------------------------------------------------------------­ 3 Butterfield Peaks Formation ---------------------------------------------------------------------------------------------------------- 4 Bingham Mine Formation -------------------------------------------------------------------------------------------------------------- 5 Furner Valley Limestone (new name) ---------------------------------------------------------------------------------------- 6 Post-Oquirrh Group rocks ---------------------------------------------------------------------------------------------------------------------- 8 Correlation ---------------------------------------------------------------------------------------------------------------------------------------------------- 9 Configuration of Oquirrh basin ------------------------------------------------------------------------------------------------------------ 11 Fusulinid faunas ---------------------------------------------------------------------------------------------------------------------------------------- 13 Butterfield Peaks Formation ---------------------------------------------------------------------------------------------------------- 13 Bingham Mine Formation -------------------------------------------------------------------------------------------------------------­ 13 Furner Valley Limestone ---------------------------------------------------------------------------------------------------------------- 14 Conclusions -------------------------------------------------------------------------------------------------------------------------------------------------- 14 Measured section of Bingham Mine Formation ---------------------------------------------------------------------------­ 15 Type section of Furner Valley Limestone ---------------------------------------------------------------------------------------­ 17 Reference section of Furner Valley Limestone -------------------------------------------------------------------------------- 18 References cited ------------------------------------------------------------------------------------------------------------------------------------------ 20 ILLUSTRATIONS [Plate 1 in pocket; plates 2-4 follow references] PLATE 1. Simplified geologic map of the Furner Ridge quadrangle and columnar sections of the Oquirrh Group, Utah. 2. Fusulinids from the Butterfield Peaks and Bingham Mine Formations on Jericho and Furner Ridges. 3. Fusulinids from the Furner Valley Limestone on Jericho and Furner Ridges. 4. Fusulinids from the Furner Valley Limestone. Page FIGURE 1. Map of Utah showing location of report ---------------------------------------------------------------------------------------------------------------------------------------------- 1 2. Isopach map of Pennsylvanian and Lower Permian strata in northwestern Utah____________________________________________________________________ 12 3. Distribution of fusulinids in the Butterfield Peaks and Bingham Mine Formations ________________ -------------------------------------- 14 4. Distribution of fusulinids in the Furner Valley Limestone------------------------------------------------------------------------------------------------------------------ 15 III STRATIGRAPHY AND MICROF A UN AS OF THE OQUIRRH GROUP IN THE SOUTHERN EAST TINTIC MOUNTAINS, UTAH By H. T. MoRRIS, R. C. DovGLASS, and R. W. KoPF ABSTRACT ACKNOWLEDGMENTS The Oquirrh Group of Pennsylvanian and Permian age in the This paper is largely a byproduct of geologic southern East Tintic Mountains, Utah, is more than 15,000 feet mapping in the Furner Valley quadrangle and (4,572 m) thick and consists of an incomplete section of the West adjacent areas in west-central Utah by Morris Canyon Limestone (Morrowan) 960 feet (293 m) thick, a nearly complete section of the Butterfield Peaks Formation (Atokan(?) (1977), correlative stratigraphic studies by Morris and Des Moinesian) about 5,800 feet (1,768 m) thick, a complete and Kopf (1970a, b), and other studies. A total of 46 section of the Bingham Mine Formation (Missourian) 3,200-3,400 collections of fusulinids were studied by Douglass, feet thick (975-1,036 m), and a complete section of the newly who also examined the principal rock units in the named Furner Valley Limestone (Missourian to Wolfcampian) field and made additional collections of fusulinids in 5,000-6,000 feet (1,524-1,829 m) thick. The formations below the Furner Valley Limestone are generally similar to their 1975. Other acknowledgments are made in the text, counterparts in their type areas in the central and southern Oquirrh Mountains but are somewhat thinner and less 42°j!114° _______ - arenaceous. The Furner Valley Limestone, more than 90 percent carbonate, is apparently unique. Strata of the same age in the Wasatch, Stansbury, Cedar, Hogup, and Promontory Mountains I in Utah are all considerably arenaceous; in the southern Oquirrh Mountains in the upper plate of the Midas thrust fault they have been largely removed by erosion. The Oquirrh Group in the East Tintic Mountains is overlain by the Diamond Creek Sandstone; the latter, in turn, is overlain by the Park City Formation. No units lithologically resembling the Kirkman Limestone of the Wasatch Mountains are recognized. Fusulinids are common in the Butterfield Peaks and Bingham Mine Formations and are present throughout the Furner Valley Limestone. The faunas are comparable to those of the Oquirrh Group in the Oquirrh and Cedar Mountains to the west and in the Wasatch Mountains to the east. INTRODUCTION Geologic studies in the southern East Tin tic Moun­ tains of central Utah (fig. 1 and plate lA) have disclosed the presence of at least parts of all the formations composing the Bingham sequence of the Oquirrh Group (Tooker and Roberts, 1970) and in addition, a heretofore unnamed formation, logically a partofthegroup, that is notpresentin the type area of the group in the central Oquirrh Mountains. This newly recognized, predominantly carbonate unit, herein named the Furner Valley Lim£;stone, is designated the uppermost unit of the Bingham 0 40 80 MILES 1 1 I I 1 1 I I I I I! sequence of the Oquirrh Group. It is 5,000-6,000 feet 0 40 80 100KILOMETERS (1,524-1,829 m) thick and contains fossils of Late Pennsylvanian and Early Permian age. FIGURE 1.-Map of Utah showing location of report. 1 2 STRATIGRAPHY AND MICROFAUNAS, OQUIRRH GROUP, SOUTHERN EAST TINTIC MOUNTAINS, UTAH chiefly in regard to the identifications of collections formational units. Tooker and Roberts (1961, 1963, of megafossils. 1970), whose studies in the Oquirrh Mountains LOCATION overlapped those of Welsh and James, also recommended the elevation of the Oquirrh to group As shown on plate 1A, the southern East Tintic status and its subdivision into several formations. Mountains are about 55 miles (88 km) south of the However, their regional mapping in the central and central Oquirrh Mountains, the type area of the northern parts of the range disclosed three distinctly Oquirrh Group (Upper Mississippian to Lower different sequences of upper Paleozoic rocks sepa­ Permian), and about the same distance southwest of rated from each other by the Midas and North well-studied sections of Pennsylvanian and Permian Oquirrh thrust faults. To emphasize the
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