Etude stratigraphique, pétrographique et diagénétique des grès d ...
Etude stratigraphique, pétrographique et diagénétique des grès d ...
Etude stratigraphique, pétrographique et diagénétique des grès d ...
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tel-00534181, version 1 - 9 Nov 2010<br />
Chapter III<br />
(a)<br />
(b)<br />
Early Rifted Zone<br />
Tugen Hills Flexure<br />
W<br />
0<br />
KF<br />
Kerio Basin<br />
(Proto-Saimo Fault)<br />
Baringo Basin<br />
Proto-LRBF<br />
E<br />
5<br />
10<br />
(km)<br />
Stage 1: Palaeogene to Early Miocene<br />
W EF Kerio Basin<br />
SF<br />
Baringo Basin<br />
E<br />
LRBF<br />
0<br />
KF Ngorora Formation BF<br />
Mpesida-Chemeron Formations<br />
5<br />
10<br />
(km)<br />
Stage 3: Upper Miocene<br />
120<br />
W<br />
0<br />
5<br />
10<br />
(km)<br />
Stage 2: Early to Mid-Miocene<br />
Extensive Post-Faulting Volcanism {21-10.3 Ma}<br />
W<br />
SF<br />
EF Kerio Basin<br />
Baringo Basin<br />
E<br />
BF<br />
LRBF<br />
0<br />
KF Ewalel/Kabarn<strong>et</strong> F. Tasokwan F.<br />
W<br />
Kerio Basin<br />
SF<br />
Baringo Basin<br />
E W Kerio Basin<br />
Baringo Basin<br />
Kaparaina Basalts SF<br />
E<br />
Kapthurin/Loboi F.<br />
0 EF KF<br />
BF<br />
LRBF<br />
0 EF KF<br />
BF<br />
LRBF<br />
KaF KF KaF KF<br />
5<br />
10<br />
(km)<br />
Stage 5: Pliocene<br />
SEE<br />
Uasin<br />
Gishu<br />
Phonolite<br />
{14.5-12 Ma}<br />
Chof<br />
Phonolite<br />
{15.0 Ma}<br />
Elgeyo<br />
Basalts<br />
{15.1-15.6 Ma}<br />
Kimwarer<br />
NEE<br />
Uasin<br />
Gishu<br />
Phonolite<br />
Tambach<br />
Formation<br />
maximum age<br />
uncertain<br />
0 m<br />
100<br />
500<br />
?<br />
0 m<br />
100<br />
500<br />
KB<br />
QS<br />
Ewalel/Kabarn<strong>et</strong><br />
(UMV)<br />
Ngorora F.<br />
(UMS)<br />
{13-8.5 Ma}<br />
"Middle Ngorora<br />
Volcanics"<br />
"Lower<br />
Ngorora F."<br />
1.1 km<br />
Uasin<br />
Gishu<br />
Phonolite<br />
Chof<br />
Tambach<br />
Elgeyo<br />
?<br />
Kimwarer<br />
unknown formation<br />
?<br />
?<br />
Basement<br />
at 6 ± 1 km<br />
(from Mugisha<br />
<strong>et</strong> al. , 1997)<br />
TH<br />
Kabarn<strong>et</strong><br />
Trachyte<br />
{7 Ma}<br />
Ewalel<br />
Phonolite<br />
{8.5 Ma}<br />
Ngorora<br />
Formation<br />
{13.1-8.5 Ma}<br />
Tiim<br />
Phonolite<br />
{14,3-13,1 Ma}<br />
Saimo F.<br />
Noroyan F.<br />
Sidekh F.<br />
{16,0-14,4 Ma}<br />
Kamego<br />
5<br />
10<br />
(km)<br />
Stage 4: Upper Miocene<br />
5<br />
0 m<br />
100<br />
500<br />
10<br />
(km)<br />
Stage 6: Pleistocene to Present<br />
BB<br />
Kapthurin F.<br />
{0.7-0.2 Ma}<br />
Hannington<br />
Trachyphonolites<br />
{1 Ma}<br />
Kwaibus<br />
Basalts<br />
{2 Ma ?}<br />
Lukeino/<br />
Chemeron<br />
Formations<br />
{6.2-1.6 Ma}<br />
?<br />
Mpesida<br />
Beds<br />
{7-6.2 Ma}<br />
Rumuruti<br />
Phonolites<br />
{12-10.3 Ma}<br />
Samburu<br />
Basalts<br />
{21-11 Ma}<br />
370 m<br />
1.5 km<br />
3.5/5 km<br />
Deep<br />
rhomboid<br />
graben<br />
Basement at 8 km<br />
0 25 km<br />
E
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