'THE GEOLOGY AND MINERAL RESOURCES OF DHUFAR PROVINCE, MUSCAT AND OMAN' [‎27v] (44/96)

f
the last but one journey (taking away gear and staff) The course
was in a north-easterly direction so that we flew a little north of
Darbat lake and the Jabal Samhan over the barren country near the
headwaters of the Andhaur wadi A seasonal or intermittent watercourse, or the valley in which it flows. system (where the hills are flat-
topped and strata evidently almost horizontal). At Masira island I
procured a few pieces of the dark limestone (Eocene) and basic
igneous rock (Semail Igneous series of upper Jurassic, Portlandian,
to lower Cretaceous, Neocomian, age). From Masira we flew to
near Ras Jiwani (near Gwadur West bay) where middle Tertiary
(Miocene: middle, Tortonian to Helvetian) strata, the Ears series,
occur and continue eastwards into Gwadur. We turned east,
out to sea south of Gwadur, for Karachi, and I was able to check my
previous observations (paragraph 30). Next day, the 18th February,
I continued my journey, from Karachi to New Delhi, by a B.O.A.C.
connection, on an Indian National Airways York plane. The course
lay north-east so as to cross the Indus a little north of Hyderabad
(Sind) and I was able to see the monoclinal folds, facing east, as we
crossed the area of Bhula Khan (Thana), east of the Kirthar range,
over lower Eocene (Eaki) and some upper Eocene (Kirthar)
formations. My general impression from these observations and
those along the Arabian coast and my knowledge of the geology of
the coast of western India, south of the Great Rann of Cutch and
Kathiawar and Guzerat, is that, structurally, the ranges of Sind
and Baluchistan belong to the Persian and Oman system.
30