GRD00CPS0
I-502
Foid-Bearing Extrusive
Cenozoic › Quaternary › Pleistocene
0.01
-
2.6
1
Ritter 154 › Cabinet 16 › Drawer N
-
Nephelinite Samples I-501 to I-510 taken from Congo Tanganikia province.
K-Ar age on nephelinite 1.03 and 0.91 Ma (Evans et al., 1971)
East African Rift
Congo {Democratic Rep}
Alkaline volcanic province, Tanganika. Burko Volcano.
Latitude: -3.3°
Longitude: 36.217°
-
Slight resorption in plagioclase and orthopyroxene
2.5
plane
Note the slight resorption and rim overgrowth in the pyroxene.
2.5
crossed
-
scan
crossed
GRD00CPT0: Plagioclase, orthopyroxene, augite. (C. Eichler)
N/A
Evans_Nature_1971
Evans, A.L., Fairhead, J.D., Mitchell, J.G. 1971. Potassium-Argon Ages from the Volcanic Province of Northern Tanzania, Nature Physical Science, vol. 229, pg. 19-20.