Concepts learned from a 3d outcrop of a sinuous slope channel complex: Beacon channel complex, brushy canyon formation, West Texas, U.S.A

Journal of Sedimentary Research

Volumn 80, Issue 1-2, 2010, Pages 67-96

  Pyles, David R ^a   Jennette, David C ^b   Tomasso, Mark ^c   Beaubouef, Rick T ^d   Rossen, Christine ^e  

^a Department of Geology and Geological Engineering   (United States)

^b APACHE CORPORATION   (United States)

^c UNIVERSITY OF WYOMING   (United States)

^d HESS CORPORATION   (United States)

^e EXXONMOBIL UPSTREAM RESEARCH COMPANY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

STRATIGRAPHY;

3D SEISMIC; BATHYMETRIC FEATURES; CHANNEL COMPLEX; CHANNEL SYSTEMS; CONTINENTAL MARGIN; PERMIAN;

BATHYMETRY;

CHANNEL MORPHOLOGY; CONTINENTAL MARGIN; OUTCROP; SEQUENCE STRATIGRAPHY; SUCCESSION; THREE-DIMENSIONAL MODELING;

TEXAS; UNITED STATES;

EID: 77649110609     PISSN: 15271404     EISSN: None     Source Type: Journal    
DOI: 10.2110/jsr.2010.009     Document Type: Article

References (76)

1. ABREU, V., SULLIVAN, M., PIRMEZ, C., AND MOHRIO, D., 2003, Lateral accretion packages (LAPs): an important reservoir element in deep water sinuous channels: Marine and Petroleum Geology, v. 20, p. 631-648.
2. AMERMAN, R., NELSON, E.P., TRUDGILL, B., AND GARDNER, M.H., in press, Submarine mass transport complex evolution and control on overlying reservoir deposition, Permian Cutoff Formation, west Texas, in Shipp, C., Weimer, P., and Posamentier, H., eds., The Importance of Mass-Transport Deposits in Deepwater Settings, SEPM, Special Publication.
3. ARNOTT, R.W.C., 2003, Stratal architecture and origin of lateral accretion deposits (LADs) and conterminous inter-bank levee deposits in a base-of-slope sinuous channel, lower Isaac Formation (Neoproterozoic), east-central British Columbia, Canada: Marine and Petroleum Geology, v. 24, p. 515-828.
4. ARNOTT, R.W.C., 2007, Architecture of lateral-accretion deposits in two stacked deepwater sinuous channel fills: Relationship between coarse channel-fill and adjacent inner-bend levee deposits, Isaac Channel 2, Castle Creek South, Windermere Supergroup, British Columbia, Canada, in Nilsen, T.H., Shew, R.D., Steffens, G.S., and Studlick, J.R.J., eds., Atlas of Deep-Water Outcrops, American Association of Petroleum Geologists, Studies in Geology 56, p. 89-92.
5. BABONNEAU, N., SAVOYE, B., CREMER, M., AND KLEIN, B., 2002, Morphology and architecture of the present canyon and channel system of the Zaire deep-sea fan: Marine and Petroleum Geology, v. 19, p. 445-467.
6. BAPTISTA, N., 2004, Deep-water depositional patterns and sequence stratigraphic framework of the Permian Brushy Canyon Formation across the Delaware Basin, West Texas and Southeastern New Mexico, USA [Unpublished Master's Thesis]: Colorado School of Mines, 181 p.
7. BARTON, M.D., O'BYRNE, C.J., PRATHER, B., PIRMEZ, C., SYLVESTER, Z., AND COMMINS, D., 2007, Deep-water channel-complex architecture, Popo Fault Block, Brushy Canyon Formation, Texas, USA-Part 2: Facies Architecture, HI Nilsen, T.H., Shew, R.D., Steffens, G.S., and Studlick, J.R.J., eds., Atlas of Deep-Water Outcrops, American Association of Petroleum Geologists, Studies in Geology 56, p. 463-466.
8. BEAUBOUEF, R.T., ROSSEN, C., ZELT, F.B., SULLIVAN, M.D., MOHRIG, D.C., AND JENNETTE, D.C., 1999, Deep-Water Sandstones, Brushy Canyon Formation, West Texas: Field Guide, Hedberg Field Research Conference, April 15-20, 1999, American Association of Petroleum Geologists, Continuing Education Course Note Series, no.40, 26 p.
9. BEAUBOUEF, R.T., ROSSEN, C., AND LOVELL, R.W.W., 2007, The Beacon Channel: a newly recognized architectural type in the Brushy Canyon Formation, Texas, U.S.A., in Nilsen, T.H., Shew, R.D., Steffens, G.S., and Studlick, J.R.J., eds., Atlas of DeepWater Outcrops, American Association of Petroleum Geologists, Studies in Geology 56, p. 432-443.
10. BELUAN, J.A., KERANS, C., AND JENNETTE, D.C., 2005, Digital outcrop models: applications of terrestrial scanning lidar technology in stratigraphie modeling: Journal of Sedimentary Research, v. 75, p. 16-176.
11. BOUMA, A.H., 1962, Sedimentology of Some Flysch Deposits; A Graphic Approach to Facies Interpretation: Amsterdam, Elsevier, p. 48-99.
12. CAMPION, K.M., SPRAGUE, A.R., MOHRIG, D., LOVELL, R., DRZEWIECKI, P.A., SULLIVAN, M.D., ARDILL, J.A., JENSEN, G.N., AND SICKAFOOSE, D.K., 2000, Outcrop expression of confined channel complexes, in Weimer, P., Slatt, R.M., Bouma, A.H., and Lawrence, D.T., eds., Deep-Water Reservoirs of the World, SEPM, Gulf Coast Section, 20th Annual Research Conference, p. 127-150.
13. CHAPIN, M.A., DAVIES, P., GIBSON, J., AND PETTINGILL, H.S., 1994, Reservoir architecture of turbidite sheet sandstones in laterally extensive outcrops, Ross Formation, western Ireland, in Weimer, P., Bouma, A.H., and Perkins, B.F., eds., Submarine Fans and Turbidite Systems: Sequence Stratigraphy, Reservoir Architecture and Production Characteristics, SEPM, Gulf Coast Section, 15th Annual Research Conference, p. 53-68.
14. CLARK, J.D., KENYON, N.H., AND PICKERING, K.T., 1992, Quantitative analysis of the geometry of submarine channels: Implication for the classification of submarine fans: Geology, v. 20, p. 633-636.
15. DAS, H.S., IMRAN, J., PIRMEZ, C., AND MOHRIG, D., 2004, Numerical modeling of flow and bed evolution in meandering submarine channels: Journal of Geophysical Research, v. 109, C10009, doi: 10.1029/2002JCO01518, 17 p.
16. DEPTUCK, M.E., STEFFENS, G.S., BARTON, M., AND PIRMEZ, C., 2003, Architecture and evolution of upper fan channel-belts on the Niger Delta slope and in the Arabian Sea: Marine and Petroleum Geology, v. 20, p. 649-676.
17. DEPTUCK, M.E., SYLVESTER, Z., PIRMEZ, C., AND O'BYRNE, C., 2007, Migration-aggradation history and 3-D seismic geomorphology of submarine channels in the Pleistocene Benin-Major Canyon, western Niger Delta slope: Marine and Petroleum Geology, v. 24, p. 406-433.
18. DYKSTRA, M., 2005, Dynamics of Sediment Mass-Transport from the Shelf to the Deep Seas [Unpublished Ph.D. Dissertation]: University of California, Santa Barbara, 152 p.
19. DYKSTRA, M., AND KNELLER, B., 2008, Lateral accretion in a deep-marine channel complex: implications for channelized flow processes in turbidity currents: Sedimentology, doi: 10.1111/j.1365-3091.2008.01040.x, 22 p.
20. ELLIOTT, T., 2000, Depositional architecture of a sand-rich, channelized turbidite system: The Upper Carboniferous Ross Sandstone Formation, western Ireland, in Weimer, P., Slatt, R.M., Coleman, J., Rossen, N.C., Nelson, H., Bouma, A.H., Styzen, M.J., and Lawrence, D.T., eds., Deep-Water Reservoirs of the World, Gulf Coast Section SEPM, 20th Annual Perkins Research Conference, p. 342-373.
21. FITCHEN, W.M., 1997, Carbonate sequence stratigraphy and its application to hydrocarbon exploration and reservoir development, in Palaz, I., and Marfurt, K.J., eds., Carbonate Seismology, Society of Exploration Geophysists, Geophysical Development Series, no.6, p. 121-178.
22. FLOOD, R.D., AND DAMUTH, J.E., 1987, Quantitative characteristics of sinuous distributary channels on the Amazon deep-sea fan: Geological Society of America, Bulletin, v. 98, p. 728-738.
23. FRIEND, P.F., SLATER, M.J., AND WILLIAMS, R.C., 1979, Vertical and lateral building of river sandstone bodies, Ebro Basin, Spain: Geological Society of London, Journal, v. 136, p. 39-46.
24. GARDNER, M.H., 1992, Sequence stratigraphy of eolian-derived turbidites: deep water sedimentation patterns along an arid carbonate platform and their impact on hydrocarbon recovery in Delaware Mountain Group reservoirs, West Texas, in Murk, D.H., and Curran, B.C., eds., Permian Basin Exploration and Production Strategies: Applications of Sequence Stratigraphic and Reservoir Characterization Concepts, West Texas Geological Society, Publication 92-91, p. 7-12.
25. GARDNER, M.H., AND SONNENFELD, M.D., 1996, Stratigraphic changes in facies architecture of the Permian Brushy Canyon Formation in Guadalupe Mountains National Park, west Texas, in DeMis, W.D., and Cole, AG., eds., The Brushy Canyon Play in Outcrop and Subsurface: Concepts and Examples, SEPM, Permian Basin Section, Publication 96-38, p. 17-40.
26. GARDNER, M.H., AND BORER, J.M., 2000, Submarine channel architecture along a slope to basin profile, Brushy Canyon Formation, west Texas, in Bouma, A.H., and Stone, CG., eds., Fine-Grained Turbidite Systems, American Association of Petroleum Geologists, Memoir 72/SEPM, Special Publication 68, p. 195-214.
27. GARDNER, M.H., BORER, J.M., MELICK, J.J., MAVILLA, N., DECHESNE, M., AND WAGERLE, R.N., 2003, Stratigraphic process-response model for submarine channels and related features from studies of Permian Brushy Canyon outcrops, West Texas: Marine and Petroleum Geology, v. 20, p. 757-787.
28. GEE, M.J.R., AND GAWTHORPE, R.L., 2006, Submarine channels controlled by salt tectonics: Examples from 3D seismic data offshore Angola: Marine and Petroleum Geology, v. 23, p. 443-458.
29. GEE, M.J.R., GAWTHORPE, R.L., BAKKE, K., AND FRIEDMANN, S.J., 2007, Seismic geomorphology and evolution of submarine channels from the Angolan continental margin: Journal of Sedimentary Research, v. 77, p. 433-446. (Pubitemid 47045807)
30. HARMS, J.C., 1974, Brushy Canyon Formation, Texas: A deep-water density current deposit: Geological Society of America, Bulletin, v. 85, p. 1763-1784.
31. HILL, C.A., 1995, Geology of the Delaware Basin, Guadalupe, Apache, and Glass Mountains, New Mexico and West Texas: SEPM, Permian Basin Section, Publication 96-39, 480 p.
32. HILL, C.A., 1999, Reevaluation of the Hovey Channel in the Delaware Basin, West Texas: American Association of Petroleum Geologists, Bulletin, v. 83, p. 277-294.
33. IMRAN, J.M., ISLAM, A., HUANG, H., KASSEM, A., DICKERSON, J., PIRMEZ, C., AND PARKER, G., 2007, Helical flow couplets in submarine gravity underflows: Geology, v. 35, p. 659-662.
34. KEEVIL, G.M., PEAKALL, J., BEST, J.L., AND AMOS, K.J., 2006, Flow structure in sinuous submarine channels: Velocity and turbulence structure of an experimental submarine channel: Marine and Petroleum Geology, v. 229, p. 241-257.
35. KERANS, C., FITCHEN, W.M., GARDNER, M.H., SONNENFELD, M.D., TINKER, S.W., AND WARDLAW, B.R., 1992, Styles of sequence development within uppermost Leonardian through Guadalupian strata of the Guadalupe Mountains, Texas and New Mexico, in Murk, D.H., and Curran, B.C., eds., Permian Basin Exploration and Production Strategies-Applications of Sequence Stratigraphie and Reservoir Characterization Concepts, West Texas Geological Society, Symposium, Publication 92-91, 117 p.
36. KING, P.B., 1942, Permian of west Texas and southeastern New Mexico: American Association of Petroleum Geologists, Bulletin, v. 26, p. 535-763.
37. KING, P.B., 1948, Geology of the Southern Guadalupe Mountains, Texas: United States Geological Survey, Professional Paper P-215, 183 p.
38. KOLLA, V., BOURGES, P., URRUTY, J.M., AND SAFA, P., 2001, Evolution of deep-water Tertiary sinuous channels offshore Angola (west Africa) and implications for reservoir architecture: American Association of Petroleum Geologists, Bulletin, v. 85, p. 1373-1405.
39. KOLLA, V., POSAMENTIER, H.W., AND WOOD, L.J., 2007, Deep-water and fluvial sinuous channels-Characteristics, similarities and dissimilarities, and modes of formation: Marine and Petroleum Geology, v. 24, p. 388-405.
40. KULLMAN, A.J., 1999, Fracture networks and fault zone features in a deep water sandstone, Brushy Canyon Formation, west Texas [Unpublished Master's Thesis]: Colorado School of Mines, 256 p.
41. LIEN, T., WALKER, R.G., AND MARTINSEN, O.J., 2003, Turbidites in the Upper Carboniferous Ross Formation, western Ireland: reconstruction of a channel and spillover system: Sedimentology, v. 50, p. 113-148.
42. LOWE, D.R., 1982, Sediment gravity flows II: Depositional models with specific reference to the deposits of high-density turbidity currents: Journal of Sedimentary Petrology, v. 52, p. 279-297.
43. MARTINSEN, O.J., AND LIEN, T., 2007, Contrasting styles of slope deposition in the Gull Island Formation, Ireland, in Nilsen, T.H., Shew, R.D., Steffens, G.S., and Studlick, J.R.J., eds., Atlas of Deep-Water Outcrops, American Association of Petroleum Geologists, Studies in Geology 56, p. 210-214.
44. MAYALL, M., JONES, E., AND CASEY, M., 2006, Turbidite channel reservoirs-key elements in facies prediction and effective development: Marine and Petroleum Geology, v. 23, p. 821-841.
45. NAVARRE, J.C., CLAUDE, D., LIBERELLE, E., SAFA, P., VALLON, G., AND KESKES, N., 2002, Deepwater turbidite system analysis, west Africa: Sedimentary model and implications for reservoir model construction: The Leading Edge, v. 21, p. 1132-1139.
46. NILSEN, T.H., SHEW, R.D., STEFFENS, G.S., and STUDUCK, J.R.J., eds., Atlas of Deep-Water Outcrops: American Association of Petroleum Geologists, Studies in Geology 56, 504 p. and CD-ROM.
47. O'BYRNE, C.J., BARTON, M.D., STEFFENS, G.S., PIRMEZ, C., AND BUERGISSER, H., 2007, Architecture of a laterally migrating channel complex: Channel 4, Isaac Formation, Windermere Supergroup, Castle Creek North, British Columbia, Canada, in Nilsen, T.H., Shew, R.D., Steffens, C.S., and Studlick, J.R.J., eds., Atlas of Deep-Water Outcrops, American Association of Petroleum Geologists, Studies in Geology 56, p. 115-118.
48. ORIEL, S.S., MYERS, D.A., AND CROSBY, E.J., 1967, West Texas Permian basin region, in Paleotectonic investigations of the Permian System in the United States, United States Geological Survey, Professional Paper 515C, p. 17-60.
49. PEAKALL, J., MCCAFFREY, B.W., AND KNELLER, B., 2000, A process model for the evolution, morphology, and architecture of sinuous submarine channels: Journal of Sedimentary Research, v. 70, p. 434-448.
50. PEAKALL, J., AMOS, K.J., KEEVIL, G.M., BRADBURY, P.W., AND GUPTA, S., 2007, Flow processes and sedimentation in submarine channel bends: Marine and Petroleum Geology, v. 24, p. 470-486.
51. POSAMENTIER, H., 2003, Depositional elements associated with a basin floor channel-levee system: case study from Gulf of Mexico: Marine and Petroleum Geology, v. 20, p. 677-690.
52. POSAMENTIER, H., AND KOLU, V., 2003, Seismic geomorphology and stratigraphy of depositional elements in deep-water settings: Journal of Sedimentary Research, v. 73, p. 367-388.
53. PRAY, L.C., 1988, Trail guide: day one, Bone and Shumard Canyon area, in Reid, ST., Bass, R.O., and Welch, P., eds., Guadalupe Mountains Revisited, West Texas Geological Society, Publication 88-84, p. 41-60.
54. PYLES, D.R., 2004, On the stratigraphie evolution of a structurally confined submarine fan, Carboniferous Ross Sandstone, Ireland [Unpublished Ph.D. Dissertation]: University of Colorado at Boulder, 322 p.
55. PYLES, D.R., 2007, Architectural elements in a Ponded Submarine Fan, Ross Sandstone, Ireland, in Nilsen, T.H., Shew, R.D., Steffens, G.S., and Studlick, J.R.J., eds., Atlas of Deep-Water Outcrops, American Association of Petroleum Geologists, Studies in Geology 56, CD-ROM, 19 p.
56. PYLES, D.R., 2008, Multiscale stratigraphie analysis of a structurally confined submarine fan: Carboniferous Ross Sandstone, Ireland: American Association of Petroleum Geologists, Bulletin, v. 92, p. 557-587.
57. PYLES, D.R., AND SLATT, R.M., 2007, Stratigraphy of the Lewis Shale, Wyoming, USA: Applications to understanding shelf edge to base-of-slope changes in stratigraphic architecture of prograding basin margins, in Nilsen, T.H., Shew, R.D., Steffens, G.S., and Studlick, J.R.J., eds., Atlas of Deep-Water Outcrops, American Association of Petroleum Geologists, Studies in Geology 56, CD-ROM, 19 p.
58. ROMANS, B., 2003, Sedimentation patterns of a Permian basinal cycle, Upper Cutoff, Brushy Canyon, and lower Cherry Canyon formations, western Delaware Basin, west Texas and southeastern New Mexico [Unpublished Master's Thesis]: Colorado School of Mines, 175 p.
59. Ross, C., 1986, Paleozoic evolution of southern margin of Permian Basin: Geological Society of America, Bulletin, v. 97, p. 536-554.
60. ROSSEN, C., AND BEAUBOUEF, R.T., 2007, Slope-channel complexes at Guadalupe Canyon, Upper Brushy Canyon Formation, Texas, U.S.A., in Nilsen, T.H., Shew, R.D., Steffens, G.S., and Studlick, J.R.J., eds., Atlas of Deep-Water Outcrops, American Association of Petroleum Geologists, Studies in Geology 56, p. 429-431.
61. ROSSEN, C., AND SARG, J. F., 1988, Sedimentology and regional correlation of a basinally restricted deep-water siliciclastic wedge, Brushy Canyon Formation, Cherry Canyon Tongue (Lower Guadalupian), in Reid, ST., Bass, R.O., and Welch, P., eds., Guadalupe Mountains Revisited, West Texas Geological Society, Publication 88-84, p. 127-132.
62. SAGEMAN, B.B., GARDNER, M.H., ARMENTROUT, J.M., AND MURPHY, A.E., 1998, Stratigraphie hierarchy of organic carbon-rich siltstones in deep-water facies, Brushy Canyon Formation (Guadalupian), Delaware Basin, west Texas: Geology, v. 26, p. 451-454.
63. SCHWARZ, E., AND ARNOTT, R.W.C., 2007, Stratigraphie and depositional architecture of a slope channel system: Isaac Channel 5, Castle Creek South, Isaac Formation, Windermere Supergroup, British Columbia, Canada, in Nilsen, T.H., Shew, R.D., Steffens, G.S., and Studlick, J.R.J., eds., Atlas of Deep-Water Outcrops, American Association of Petroleum Geologists, Studies in Geology 56, p. 97-101.
64. SHEW, R.D., STEFFENS, G.S., AND STUDLICK, J.R.J., 2007, Introduction: Atlas of deepwater outcrops, in Nilsen, T.H., Shew, R.D., Steffens, G.S., and Studlick, J.R.J., eds., Atlas of Deep-Water Outcrops, American Association of Petroleum Geologists, Studies in Geology 56, p. 3-6.
65. SLATT, R.M., MINKEN, J., VAN DYKE, S.K., PYLES, D.R., WITTEN, A.J., AND YOUNG, R.A., 2007, Scales of Heterogeneity of an outcropping leveed-channel system, Cretaceous Dad Sandstone Member, Lewis Shale, Wyoming, U.S.A., in Nilsen, T.H., Shew, R.D., Steffens, G.S., and Studlick, J.R.J., eds., Atlas of Deep-Water Outcrops, American Association of Petroleum Geologists, Studies in Geology 56, CD-ROM, 29 p.
66. SPRAGUE, A.R., SULLIVAN, M.D., CAMPION, K.M., JENSEN, G.N., GOULDING, F.J., GARFIELD, T.R., SICKAFOOSE, D.K., ROSSEN, C., BEAUBOUEF, R.T., ABREU, V., ARDILL, J., PORTER, M.L., AND ZELT, F.B., 2002, The physical stratigraphy of deep-water strata: a hierarchical approach to the analysis of genetically related stratigraphic elements for improved reservoir prediction [abstract]: American Association of Petroleum Geologists, Annual Meeting Program with Abstracts, A167 p.
67. STELTING, CE., DSDP Leg 96 Shipboard Scientists (1985), Migratory characteristics of a mid-fan meander belt, Mississippi Fan, in Bouma, A.H., Barnes, N.E., and Normark, W.R., eds., Submarine Fans and Related Turbidite Sequences: New York, Springer-Verlag, p. 275-282.
68. SULLIVAN, MD., JENSEN, G.N., GOULDING, F., JENNETTE, D.C., FOREMAN, J.L., AND STERN, D., 2000, Architectural analysis of deep-water outcrops: Implications for exploration and development of the Diana sub-basin, western Gulf of Mexico, in Weimer, P., Slatt, R.M., Bouma, A.H., and Lawrence, D.T., eds., Deep-Water Reservoirs of the World, SEPM, Gulf Coast Section, 20th Annual Research Conference, p. 1010-1032.
69. TOMASSO, M., PYLES, DR., BONNAFFE, F.L., JENNETTE, D.C., AND BOUROULLEC, R., 2006, Outcrop versus seismic architecture of deep-water deposits: Use of LIDAR along a slope-to-basin transect of the Brushy Canyon Formation, west Texas, in Slatt, R.M., Rosen, N.C., Bowman, M., Castagna, J., Good, T., Loucks, R., Latimer, R., and Scheming, M., eds., Reservoir Characterization, Integrating Technology and Business Practices, SEPM, Gulf Coast Section, 26th Annual Research Conference, p. 755-770.
70. WALKER, R.G., 1975, Nested submarine-fan channels in the Capistrano Formation, San demente, California: Geological Society of America, Bulletin, v. 86, p. 915-924.
71. WARDLAW, B.R., DAVYDOV, V., AND GRADSTEIN, F.M., 2004, The Permian period, in Gradstein, F.M., Ogg, J.G., and Smith, A.G., eds., A Geologic Timescale 2004: Cambridge, U.K., Cambridge University Press, p. 249-270.
72. WRIGHT, F.W., 1962, Abo reef: prime west Texas target: Oil and Gas Journal, v. 60, p. 188-194.
73. WYNN, R.B., CRONIN, BT., AND PEAKALL, J., 2007, Sinuous deep-water channels: Genesis, geometry and architecture: Marine and Petroleum Geology, v. 24, p. 341-387.
74. YANG, K.M., AND DOROBEK, S.L., 1995, The Permian Basin of west Texas and New Mexico: flexura! modeling and evidence for lithospheric heterogeneity across the Marathon Foreland, in Dorobek, S., and Ross, J., eds., Stratigraphic Evolution of Foreland Basins, SEPM, Special Publication 52, p. 37-53.
75. ZELT, F.B., AND ROSSEN, C., 1995, Geometry and continuity of deep-water sandstones and siltstones, Brushy Canyon Formation (Permian) Delaware Mountains, Texas, in Pickering, KT., Hiscott, R.N., Kenyon, N.H., Ricci Luchi, F., and Smith, R.D., eds., Atlas of Deep Water Environments-Architectural Style in Turbidite Systems: London, Chapman and Hall, p. 167-183.
76. ZIEGLER, A.M., HULVER, ML., AND ROWLEY, D.B., 1997, Permian world topography and climate, in Martini, I.P., ed., Late Glacial and Post-Glacial Environmental Changes-Quaternary, Carboniferous-Permian and Proterozoic: Oxford, U.K., Oxford University Press, p. 111-146.