Proceedings of the Second U.S. Geological Survey Workshop on the Early Mesozoic Basins of the Eastern United States U.S. Geological Survey Circular 946 Errata for Circular 946, Proceedings of the Second U.S. Geological Survey Workshop on the Early Mesozoic Basins of the Eastern United States Figure 2.3 (p.8) should appear as follows: Not enough flood water to cause major ponding. Coarse sediment is transported until stream loses competence. U) z U) <!: a:J Flood water causes lake to expand. River deposits its coarse-grained sediment at intersection with the expanding lake. Flood water causes lake level to rise over river level. Coarse sediment deposition migrates upstream, and the delta topset does not Mud prograde. Small flood 0~ Gravel No ponding ~ --~ Sand Not enough flood water to cause ponding. Stream shallows and seeps Mud into basin floor depositing all sediment. U) z U) Large flood <!: a:J Expanding pond Gravel w Flood water causes lake to expand, but far from the river source. c.J 0:: Coarse-grained sediment is transported until river shallows or in­ <!: __j tersects the expanding lake. Flood water does not significantly affect lake level. Delta topset builds out into the lake. FIGURE 2.3.-Process models for flood events and coarse-grained fluvial sediment distribution in closed basins. Small basins are tens to hundreds of square kilometers in size; large basins are thousands of square kilometers. Figure 15.1 (p.82) should show the line oflow-Ti02 diabase in Pennsylvania and Maryland extending down to locality 9 in the Culpeper basin, Virginia. Neither the White Mountain Magma Series inNew Hamp­ shire and Vermont nor the nearby dikes to the east and southeast are low-Ti02 magma types; both belong to a separate New England magmatic province. The Ware dikes are quartz-normative, low­ Ti02. On the explanation (p.83), York Haven (16) should include granophyre (G); 21 should be Barndoor rather than Buttress. Figure 15.3 (p.85) should appear as follows: Note: Unrt 2 uplrfted thrckness of buried sill X between cone sheet Y Syn-intrusion and "stock" Z; Units 3, 4, and 5 I EARLY JURASSIC Pre-tilting uplifted thickness of "stock" Z Pre-erosion ±sill X Post-intrusion and extrusion Pre-Triassi~ < < Post-tilting and erosion Ill MAP VIEW FIGURE 15.3.-Schematic cartoon showing cross sections before (I) and after (II) tilting and erosion; (III) map view of hypothetical early Mesozoic basin containing diabase intrusions and basalt flows. Add the following sentence to caption for figure 31.1 (p. 140): · Southern boundaryofbasin (extremely heavy line) is an unconformity. Proceedings of the Second U.S. Geological Survey Workshop on the Early Mesozoic Basins of the Eastern United States Gilpin R. Robinson, Jr., and Albert j. Froelich, editors U.S. Geological Survey Circular 946 1985 DEPARTMENT OF THE INTERIOR DONALD PAUL HODEL, Secretary U.S. GEOLOGICAL SURVEY Dallas L. Peck, Director Library of Congress Cataloging-in-Publication Data U.S. Geological Survey Workshop on the Early Mesozoic Basins of the Eastern United States (2nd : 1984 : Reston, Va.) Proceedings of the Second U.S. Geological Survey Workshop on the Early Mesozoic Basins of the Eastern United States. (U.S. Geological Survey circular ; 946)ProceedingsoftheworkshopheldNov.14-16, 1984, Reston, Va. Supt. ofDocs. no. : I 19.4/2:946 1. Geology, Stratigraphic-Mesozoic-Congresses. 2. Geology-United States-Congresses. I. Robinson, Gilpin R. II. Froelich, A. J. (AlbertJoseph), 1929- III. Title. IV. Series. QE675. U618 1985 551. 7'6'0975 85-18829 Free on application to Distribution Branch, Text Products Section, U.S. Geological Survey, 604 South Pickett Street, Alexandria, VA 22304 CONTENTS Page Page Foreword, by Gilpin R. Robinson, Jr., and Albert J. Froelich . vii 16. Geochemical and petrologic features of some Mesozoic Workshop overview, by Gilpin R. Robinson, Jr., Joseph P. diabase sheets in the northern Culpeper basin, by Smoot, and Albert J. Froelich ..................... vii David Gottfried and Albert J. Froelich ............... 86 Stratigraphy, sedimentology, tectonics, and geophysics 17. Petrology of the Boyds diabase sheet, northern Culpep- 1. Newark Supergroup, a revision of the Newark Group in er basin, Maryland, by Paul C. Ragland and eastern North America, by Albert J. Froelich and Jonathan D. Arthur ............................. 91 P.E. Olsen ...................................... 1 18. Geochemical reconnaissance of diabase from Vulcan 2. The closed-basin hypothesis and its use in facies analy- Materials Quarry in the Culpeper Mesozoic basin, sis of the Newark Supergroup, by Joseph P. Smoot ..... 4 near Manassas, Virginia, by J.A. Philpotts, D. 3. New thoughts on facies relationships in the Triassic Gottfried, F.W. Brown, Z.A. Brown, W.B. Crandell, Stockton and Lockatong Formations, Pennsylvania A.F. Dorrzapf, Jr., J.D. Fletcher, D.W. Golightly, and New Jersey, by Christine E. Turner-Peterson L. Mei, and N. Rait .............................. 99 and Joseph P. Smoot ............................ 10 19. Some compositional aspects of Mesozoic diabase sheets 4. Alluvial fan development in the Lower Jurassic Portland from the Durham area, North Carolina, by Z.A. Formation, central Connecticut -Implications for Brown, P.J. Aruscavage, F.W. Brown, L. Mei, P.P. tectonics and climate, by Peter M. LeTourneau ........ 17 Hearn, and J.A. Philpotts ........................ 103 5. Palynostratigraphy of coal-bearing sequences in early 20. Recent petrologic studies of Mesozoic igneous rocks in Mesozoic basins of the Eastern United States, by Connecticut, by A.R. Philpotts .................... 107 Eleanora I. Robbins ............................. 27 21. Progress on geochronology of Mesozoic diabases and 6. Massive mudstones in basin analysis and paleoclimatic basalts, by John F. Sutter ....................... 110 interpretation of the Newark Supergroup, by Jo- 22. Pearce-Cann discriminant diagrams applied to eastern seph P. Smoot and P.E. Olsen ..................... 29 North American Mesozoic diabase, by John A. 7. Constraints on the formation of lacustrine micro- Philpotts ..................................... 114 laminated sediments, by P.E. Olsen ................. 34 Mineral resources 8. Fault reactivation models for origin of the Newark basin 23. Ore deposit models and mineral resource studies in the and studies related to Eastern U.S. seismicity, by early Mesozoic basins of the Eastern United States, Nicholas M. Ratcliffe and William C. Burton .......... 36 by Gilpin R. Robinson, Jr......................... 117 9. Distribution and geophysical signature of early Mesozo­ 24. Modes of uranium occurrence in the Newark basin, New ic rift basins beneath the U.S. Atlantic continental Jersey and Pennsylvania, by Christine E. Turner- margin, by Kim D. Klitgord and Deborah R. Hutch- Peterson, P.E. Olsen, and Vito F. Nuccio ............ 120 inson ......................................... 45 25. Copper, nickel, and cobalt fractionation patterns in Mes­ Organic geochemistry ozoic tholeiitic magmas of eastern North America 10. Distribution of organic-matter-rich lacustrine rocks in - Evidence for sulfide fractionation, by David the early Mesozoic Newark Supergroup, by P.E. Gottfried ..................................... 125 Olsen ......................................... 61 26. Magnetite skarn deposits of the Cornwall (Penn­ 11. Nuclear magnetic resonance studies of organic-matter­ sylvania) type- A potential cobalt, gold, and silver rich sedimentary rocks of some early Mesozoic ba­ resource, by Gilpin R. Robinson, Jr................. 126 sins of the Eastern United States, by Patrick G. Topical study of Gettysburg basin Hatcher and Lisa A. Romankiw .................... 65 27. Gravimetric character and anomalies in the Gettysburg 12. Stable-isotope characterization of organic matter in the basin, Pennsylvania - A preliminary appraisal, by early Mesozoic basins of the Eastern United States, David L. Daniels ............................... 128 by Elliott C. Spiker .............................. 70 28. Aeromagnetic character and anomalies of the Gettys- 13. Geochemical and isotopic characterization of organic burg basin and vicinity, Pennsylvania - A prelimi- matter in rocks of the Newark Supergroup, by Lisa nary appraisal, by Jeffrey D. Phillips ............... 133 M. Pratt, April K. Vuletich, and Ted A. Daws ......... 7 4 29. Hydrogeochemical exploration in the early Mesozoic ba- 14. Organic geochemistry in sedimentary basins and ore sins of southeastern Pennsylvania, by W.H. Ficklin, deposits - The many roles of organic matter, by J.B. McHugh, and James M. McNeal ............... 135 Gilpin R. Robinson, Jr............................ 78 30. The use of sulfur isotopes as a geochemical exploration Igneous geochemistry technique in the early Mesozoic basins of Penn- 15. Early Jurassic diabase sheets of the Eastern United sylvania, by James M. McNeal .................... 136 States - A preliminary overview, by Albert J. 31. A preliminary analysis of linear features of the Gettys- Froelich and David Gottfried ...................... 79 burg basin, Pennsylvania, by M.D. Krohn, O.D. Jones, and J.G. Ferrigno ........................ 139 iii TABLES Pa~re TABLE 4.1. Stratigraphy of the Hartford basin . 17 5.1. Preliminary list of palynomorphs in coal-bearing sequences of early Mesozoic basins of the Eastern United States ...................................................................................... 28 8.1. Results of coring of Newark basin border faults ........................................................