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Suvrat Kher Profile picture
Suvrat Kher
@rapiduplift
Sedimentary geologist dreaming of a Himalayan home.
Jan 22, 2020 • 21 tweets • 10 min read
Natural History in Temple Building Stones.

Thread- Sedimentary depositional environments of Neoproterozoic age (900-800 million yr old) building stones of Aihole, Pattadakal and Badami temples, rock cut caves and sculptures.

#Karnataka Between ~1800 -800 million yrs ago, Indian continental crust sagged due to various tectonic forces to form several long lasting sedimentary basins. The Kaladgi Basin in which the Badami area sandstones were deposited is one such basin.

Map- ias.ac.in/article/fullte…
Nov 28, 2019 • 11 tweets • 4 min read
Thread- Wonders of the Deccan Landscape. A 66 million year river of lava...exhumed!

On Pune Nasik Road, turn east at Ale phata. Look for Mandohol Dam. And a ridge named Mhasoba Zap.

Can you spot the lava river? Basalt lava is less viscous and can flow for long distances. It can get channeled along a preexisting valley or follow lows in the landscape, forming a sinuous lava channel. Pic from USGS captures a lava channel from recent eruption in Hawaii.
Aug 30, 2019 • 11 tweets • 3 min read
Aaravali.

Not Rajasthan. But Maharashtra.

Thread- Hot Springs of Konkan. Geologic Significance One interesting feature of Konkan coastal belt is the presence of hot water springs arranged in a fairly narrow linear belt from north of Mumbai to Ratnagiri area in the south. They occur somewhat midway between the W. Ghat Escarpment and the coast.
Jul 30, 2019 • 16 tweets • 5 min read
The plateau cap layer that provides a foundation for the wind turbines (south of Satara) is an ancient hardened iron rich soil known as laterite.

Thread- Brief history of laterites of India Western Margin and their significance in understanding landscape evolution.. After Deccan volcanism ended ~ 63 mya, a vast lava field about 1 km elevation had formed. In Eocene times a phase of humid climate caused deep chemical weathering of this lava resulting in a thick weathering mantle of iron rich soil known as laterite.