WEBBASED DATABASES AND PALEOBIOGEOGRAPHY - PowerPoint PPT Presentation

1 / 55
About This Presentation
Title:

WEBBASED DATABASES AND PALEOBIOGEOGRAPHY

Description:

WEBBASED DATABASES AND PALEOBIOGEOGRAPHY – PowerPoint PPT presentation

Number of Views:149
Avg rating:3.0/5.0
Slides: 56
Provided by: allist
Category:

less

Transcript and Presenter's Notes

Title: WEBBASED DATABASES AND PALEOBIOGEOGRAPHY


1
WEB-BASED DATABASES AND PALEOBIOGEOGRAPHY
ALLISTER REES
2
ICEHOUSE WORLD
3
(No Transcript)
4
Glossopteris
5
Permian phytogeographic patterns and climate
data/model comparisons Rees, P.M., Ziegler,
A.M., Gibbs, M.T., Kutzbach, J.E., Behling, P.J.
Rowley, D.B. (2002). The Journal of Geology,
110 1-31.
Simulations of Permian climate and comparisons
with climate-sensitive sediments Gibbs, M.T.,
Rees, P.M., Kutzbach, J.E., Ziegler, A.M.,
Behling, P. Rowley, D.B. (2002). The Journal
of Geology, 110 33-55.
6
(No Transcript)
7
(No Transcript)
8
(No Transcript)
9
(No Transcript)
10
Land-plant diversity and the end-Permian mass
extinction Rees, P.M. (2002). Geology, 30
827-830.
11
(No Transcript)
12
(No Transcript)
13
(No Transcript)
14
(No Transcript)
15
(No Transcript)
16
(No Transcript)
17
(No Transcript)
18
Jurassic
Cretaceous
Tertiary
Recent
Carb.
19
HOTHOUSE WORLD
20
JURASSIC
21
LATE JURASSIC COALS, EVAPORITES AND DESERT SANDS
22
LATE JURASSIC PLANTS
microphyllous conifers microphyllous
cycadophytes
macrophyllous cycadophytes
intermediate conifers
pteridosperms
ginkgophytes macrophyllous conifers
ferns sphenophytes
23
(No Transcript)
24
(No Transcript)
25
LATE JURASSIC PLANT DIVERSITY
26
LATE JURASSIC COALS AND EVAPORITES
27
LATE JURASSIC DINOSAURS
28
(No Transcript)
29
LATE JURASSIC DINOSAURS, PLANTS BY PALEOLATITUDE
30
LATE JURASSIC SUMMARY (1) Higher latitudes
absence or paucity of dinosaurs, abundant coals,
high-diversity floras (with abundant
macrophylls) Lower latitudes regional
co-occurrence of dinosaurs with evaporites,
low-diversity floras (with abundant
microphylls) SOME TAPHONOMIC FACTORS Arid
and semi-arid climates longer residence times on
the surface for vertebrate remains, increasing
bone concentrations Humid climates bones
degrade more quickly. Higher precipitation
mobilizes more ions in the soil, leaching
surface materials (e.g. organic acids), leading
to lower pH of forest soils and dissolution and
destruction of bone. Vegetation mediates
exchange of water, minerals, and nutrients,
affecting soil chemistry. Plant roots can
adversely affect bone preservation through soil
leaching of mineral components, as well as
physical degradation. The interplay between
these factors will at least in part be
responsible for the destruction or preservation
of an animals remains. LATE JURASSIC SUMMARY
(2) This may explain why dinosaur bones are
scarce to non-existent in higher latitudes, where
climates were generally warm and wet, with broad
tracts of gymnosperm forests dominating the
landscape.
31
(No Transcript)
32
DATABASES HOME PAGE
33
DINOSAURS AND PLANTS
34
DINOSAURS AND PLANTS
35
DATABASES HOME PAGE
36
OVERVIEW
37
OVERVIEW
38
GEOGRAPHY
39
GEOLOGIC AGE
40
LITHOLOGIES
41
LITHOLOGIES
42
LITHOLOGIES
43
FOSSILS
44
FOSSILS
45
VIEW DATA
46
VIEW DATA
47
VIEW DATA
48
VIEW DATA
49
VIEW DATA
50
PALEOMAPS
51
REFERENCES
52
REFERENCES
53
REFERENCES
54
IT DETAILS
55
(No Transcript)
Write a Comment
User Comments (0)
About PowerShow.com