|
|
 |
|||||||||||||||||
|
|||||||||||||||||
 |
|||||||||||||||||
| JOURNAL HOME | HELP | CONTACT PUBLISHER | SUBSCRIBE | ARCHIVE | SEARCH | TABLE OF CONTENTS |
University of Delhi, Department of Geology, Delhi, India
Dalhousie University, Halifax, NS, Canada
Modern tropical peats require continuity of precipitation for accumulation, whereas calcretes and calcic vertisols require strongly seasonal conditions. The 20-30-m-thick cyclothems of the Sydney basin, Nova Scotia, Canada, show a systematic alternation of coals and other hydromorphic paleosols with calcretes and calcic vertisols. This implies strong variation in seasonality during the duration of a cyclothem, estimated at 200 ka. In at least one cyclothem, calcic paleosols formed on an interfluve adjacent to a paleovalley cut through marine strata, suggesting that a more seasonal and probably drier climate prevailed during sea-level lowstand. The calcic paleosols are estimated to have formed during periods of 10 4 yr, possibly indicative of partial control by obliquity and precessional cycles.
This record provided courtesy of AGI/GeoRef.
This article has been cited by other articles:
|
|
 |
|
  S. OPLUSTIL and C. J. CLEAL A comparative analysis of some Late Carboniferous basins of Variscan Europe Geological Magazine, May 1, 2007; 144(3): 417 - 448. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 H.J. Falcon-Lang Latest Mid-Pennsylvanian tree-fern forests in retrograding coastal plain deposits, Sydney Mines Formation, Nova Scotia, Canada Journal of the Geological Society, January 1, 2006; 163(1): 81 - 93. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 G. S. SOREGHAN Climate Controls on Stratigraphy: SEPM Special Publication No. 77 Palaios, June 1, 2005; 20(3): 315 - 317. [Full Text] [PDF]
|
|
|
|
 |
|
 H. R. Feldman, E. K. Franseen, R.M. Joeckel, and P. H. Heckel Impact of Longer-Term Modest Climate Shifts on Architecture of High-Frequency Sequences (Cyclothems), Pennsylvanian of Midcontinent U.S.A. Journal of Sedimentary Research, May 1, 2005; 75(3): 350 - 368. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 Pennsylvanian tropical rain forests responded to glacial-interglacial rhythms Geology, August 1, 2004; 32(8): 689 - 692.
|
|
|
|
|
|
H. J. Falcon-Lang and H.J. Falcon-Lang Response of Late Carboniferous tropical vegetation to transgressive-regressive rhythms at Joggins, Nova Scotia Journal of the Geological Society, July 1, 2003; 160(4): 643 - 648. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
From Cyclothems to Sequences: The Record of Eustasy and Climate on an Icehouse Epeiric Platform (Pennsylvanian-Permian, North American Midcontinent) Journal of Sedimentary Research, January 1, 2003; 73(1): 15 - 30.
|
|
|
|
 |
|
 J. H. Calder The Carboniferous evolution of Nova Scotia Geological Society, London, Special Publications, January 1, 1998; 143(1): 261 - 302. [Abstract] [PDF]
|
|
|
|
|
|
M. R. Leeder and M. D. Stewart Fluvial incision and sequence stratigraphy: alluvial responses to relative sea-level fall and their detection in the geological record Geological Society, London, Special Publications, January 1, 1996; 103(1): 25 - 39. [Abstract] [PDF]
|
|
|
|
|
|
J. F. Aitken and S. S. Flint Variable expressions of interfluvial sequence boundaries in the Breathitt Group (Pennsylvanian), eastern Kentucky, USA Geological Society, London, Special Publications, January 1, 1996; 104(1): 193 - 206. [Abstract] [PDF]
|
|
| JOURNAL HOME | HELP | CONTACT PUBLISHER | SUBSCRIBE | ARCHIVE | SEARCH | TABLE OF CONTENTS |
