DETRITIC FORMATIONS 15 
complete than at the above described localities along the slope of 
the mountain. It shows, as shall be found, a remarkable similarity 
with the already described strata in the profile of the Cerro Guan- 
dacol. 
ot The sandstone ridge shows but few through-going quebradas, 
; among which the most remarkable is the Quebrada Banda Florida. 
_ Another is the Quebrada Colorada, more to the south. In the for- 
mer gorge the sandstone ridge is cut across down to the crystal- 
line basement. In the interior the same immediate contact is visible 
in many localities, for instance at the northern foot of the Cerro 
Punta Colorada. 
ib 
| 
; 
; 
Y 
Fig. 10. The Cerro Punta Colorada from the north, showing the Gondwana 
strata dipping SE-ward from the crystalline basement (darker). In the fore- 
ground the subsequently dissected floodplain of Rio de los Noques. 
The stratigraphy here (fig. 10) is as follows: 
. The lowermost members represent partly the „graywacke“-sand- 
stone, partly a conglomerate, described already by Bodenbender. 
Over the crystalline basement lies according to him a conglomerate 
with boulders of „schists“, ,graywacke“, ,carboniferous slate“ and 
of granitic rocks. The hanging strata belong (according to Bo- 
denbender) to „a gray psammite reminding of the graywacke“ 
(of the Cerro Guandacol). This conglomerate may thence not be 
a basal conglomerate like that of the Cerro Guandacol profile, but 
may represent an inter-Gondwana erosion-hiatus, while detritus pro- 
