Geoscience Reference
In-Depth Information
Figure 10.53.
Cross
section over the East
African Rift in Kenya. (a)
Observed (solid line) and
model (dotted line)
Bouguer gravity
anomalies. (b) The density
model for model
anomalies shown in (a).
(c) Seismic P-wave
velocity structure as
determined from
refraction data (crust and
uppermost mantle) and
teleseismic delay times
(mantle low-velocity
zone). The northern
section is at Lake Turkana
and the southern section
is at Lake Baringo
(∼300 km apart). The rift
widens from 100 to
175 km. The dyke injection
zone (vertical lines) is
40 km wide in the south.
Stipple, rift infill; M,
Moho; EE Eigyo
escarpment; NF, Nandi
fault, separating the
Tanzanian craton (west)
from the Mozambique
Proterozoic belt (east).
Arrows indicate possible
flow of mantle rock
upwards and away from
the Kenya Dome. (After
Baker and Wohlenberg
(1971). Reprinted from
Tectonophysics
,
278
,
Mechie, J.
et al
., A model
for the structure,
composition and
evolution of the Kenya
Rift, 95-119, Copyright
1997, with permission
from Elsevier.)
