11.2 Denudation-Sediment Accumulation Systems
491
:. ------- - Ad1 -----Evolution of
a
.
closed
open systems
.. - - - - - - - Ad2,3.4
systems
\
,,'
- - - - - - - - - - - - - - - - - - - - - - ~ - - - - - - - - - - - - 1- - - 1---,,-' N'~: ~rainage
-
system
115"
11 4'
b
N 0
50
,
"
, ,
t
42"
1. VVendover core site
2. Knolls core site
3. Bunnester core si te
4. Saltair core sile
5. S28 core sile
11 3'
100 km
,
l.Ul
- -
Fig. 11.6. a General scheme displaying various problems in the assessment of hydrological budgets and
sediment mass balances for transient lake systems
with chan ging lake level. See text for explanation.
bLake Bonneville and Great Salt Lake basin (after
The Great Salt Lake and Lake Bonneville
A well-known example of this type of basin is the
Great Salt Lake or former Lake Bonneville in Utah
11 2"
Maximum extent of
Lake Bonneville
111'
Exisling lake or playa
Sill
Spencer et al. 1985; Williams 1994, modified). Note
that both the size of the drainage area and the extent
of lake sediments changed with time. (Lake Sevier is
located south of the map shown here)
(Fig. 11.6b). The average sedimentation rate of this
lake was about 120 mmlka during the past 0.8 Ma;
the mean denudation rate in its drainage area
amounted to about 40 rnmIka.