Geology Reference
In-Depth Information
Aeolian
dunes
Fig. 13.12
Jurassic-Cretaceous aeolian dunes of the Botucatu Formation covered by 132 Ma flood basalts of the Serra Geral Formation, east of
Porto Alegre. At the contact the lavas preserve the dune morphology
Fig. 13.13
Global paleo-climate models for the Late Jurassic showing
a giant paleo-desert (
circled
in
red
) in Central West Gondwana
(modified from Scherer and Goldberg
2010
). (
a
,
b
) Paleo-temperatures
(Sellwood and Valdes
2008
), and (
c
,
d
) paleo-atmospheric circulations
(Moore et al.
1992
). These models predict hot and arid conditions
(35-40
C) and strong winds blowing to the southwest (
arrows
)at
low latitudes across the Central West Gondwana surface
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