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Figure 7, Climate-Sensitive Sediment Data Form

This is the format used for each entry in our new Permian and Jurassic datasets:

Row 1, "The Geog Code" is our reference number and is based on political or physiographic boundaries. Other geographic information is provided in this row if known.

Row 2, "Latitude" and "Longitude" are recorded to the nearest tenth of a degree, to the best of our ability, while "Geog Reliability" indicates our confidence in the location (1= +/- 5km, 2= +/- 10km, 3= +/- 50km). The "Plate ID" is our reference number for determining paleolatitude from paleomagnetically determined rotations.

Rows 3 and 4, "Local Stage Top & Bottom" are included as these may be more firmly established than international stages, and to allow for future improvements in our knowledge of the correlation of the two.

Rows 5 and 6, "Interval Top & Bottom" are the currently accepted international stage names and these are numerically coded in our system.

Row 7, The "Formation" is generally the basic unit, but a subdivision of a formation can be indicated here if it differs in composition from other subdivisions. "Thickness" and "Correlation Reliability" (A through G) are also indicated.

Row 8, "Lithologies" and other codes in this row are listed in our paper on "Paleogeographic Interpretation" (Ziegler et al., 1985), except for E = Eolian, and O = Oil Source Rock. The "Early-Late" category is used to indicate a change in environment ("Env") when necessary.

Row 9, The left hand portion of this row allows the compiler to characterize a subset of the lithologies present in the formation. The right hand portion is for information on floras if present.

Row 10, This concerns the literature source used, including our own computer catalog number ("PAPeRS Ref#"), which can be accessed for the complete reference.

Rows 11 and 12 are self explanatory, while row 13 is for plotting information.





















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Figure 9, Paleotopographic Feature Data Form

Information on mountain ranges is being tabulated in this format. The upper half gives geographic information and observations on topography, structure and geophysics. The lower half arranges the geologic information in a geohistory framework. Interpretations are distinguished from the observations they are based on, and the literature sources are given throughout. Assembly of this information was begun in connection with our Permian World Topography paper (
Ziegler et al., 1997), and forms the basis for a catalog we are preparing for paleogeographic features throughout the Phanerozoic.























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Figure 10, Raised Relief Map for the Late Cretaceous

This perspective is centered on western Europe and shows much of the Northern Hemisphere. The depths of the ocean basin are based on the linear magnetic anomaly data. The shallow seaways are discussed in our paper,
The vanishing record of epeiric seas with emphasis on the Late Cretaceous "Hudson Seaway" (Ziegler & Rowley, 1998).




















Table 1, A Comparison of Diverse Features of the Icehouse and Hothouse Worlds

'ICEHOUSE' WORLD 'HOTHOUSE' WORLD
Example Late Cenozoic & Late Paleozoic Mesozoic - Early Cenozoic
Tectonic Style Collision, Telescoping Stretching, Rifting
Sea Floor Spreading Slow Rapid
Ridge, Subduction Volcanism Low High
Sea-level Narrow Shelves Broad Epeiric Seas
High Latitude Climates Glaciers, Taiga (T) & Tundra (T) Deciduous Forests (L)
Mid Latitude Climates Deciduous Forests (T) with Glacial Advances & Steppe 'Tropical' Wet & Stressed (P) Forests
Low Latitude Climates Rainforests, Savanna (P) & Deserts Savanna (P) & Deserts
Ocean Basins Cold, Oxygenated Warm, often Anoxic
Weathering, Erosion Fast, Mechanical Slow, Chemical


Abbreviations are for Seasonal Controls: L = Light, T = Temperature & P = Precipitation

PGAP Home Permian Jurassic Publications Recent Abstracts (full text) About our Data PGAP Activities