C.M. Rodrigue, 2014 Geography, CSULB Mars: Fourth Order
Landscapes Geography 441/541 S/14 Dr. Christine M. Rodrigue Slide 2
C.M. Rodrigue, 2014 Geography, CSULB Mars: Fourth Order Landscapes
The Orders of Relief for Martian Landscapes The first order was the
great crustal dichotomy: Northern lowlands: ~ 1/3 Southern
highlands: ~2/3 The second order was the large regional features:
Tharsis and Elysium rises The largest craters: Hellas, Argyre,
Isidis, Utopia Valles Marineris The polar ice caps Slide 3 C.M.
Rodrigue, 2014 Geography, CSULB Mars: Fourth Order Landscapes The
Orders of Relief for Martian Landscapes The third order was the
somewhat smaller major regions associated with the araeological
eras: In many ways, this is a cross-cutting category It addresses
the geological column or relative ages of all Martian landscapes in
terms of the three regional units that gave the three-part
sequences of Mars evolution their names: The Noachian Era The
Hesperian Era The Amazonian Era Slide 4 C.M. Rodrigue, 2014
Geography, CSULB Mars: Fourth Order Landscapes The Orders of Relief
for Martian Landscapes The fourth order is in order now: These are
smaller features (a few kilometers to a few hundred km): They are
landscapes dominated by one or two processes Fluvial valleys
Sapping alcoves Outwash channels Linear foss Folded and faulted
mountains of Thaumasia Lava tubes Layered mesas Patterned ground
Wind abraded/etched landscapes Dune fields Evidence of mass wasting
Slide 5 C.M. Rodrigue, 2014 Geography, CSULB Mars: Fourth Order
Landscapes Secondary cratering issue: (W.K. Hartmann painting
http://psi.edu/hartmann/) Slide 6 C.M. Rodrigue, 2014 Geography,
CSULB Mars: Fourth Order Landscapes Secondary cratering issue:
Secondary cratering from a primary impact event can be hard to
detect odd-shaped craters are often described as secondaries lower
velocity impacts don't produce a symmetrical detonation Slide 7
C.M. Rodrigue, 2014 Geography, CSULB Mars: Fourth Order Landscapes
Secondary cratering issue: Secondary cratering from a primary
impact event can be hard to detect just from odd shapes Plot
complication: really low angle impacts,
