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Re: Scientists conclude asteroid, not volcanoes, wiped out dinosaurs

 Did some of these papers also find the KT boundary is one of these
 intertrappen beds?

Yes; in at least one place, the boundary layer (complete with iridium spike) lies within an intertrappean sediment bed, and sauropod eggshell fragments reach all the way up to the boundary and then stop.

Unfortunately there don't seem to be any other Paleocene terrestrial sediments in India, or at least I haven't heard of any. That's a great pity, because there's currently no terrestrial fossil record in India between the K-Pg boundary and the early Eocene when India had already collided with Asia. The period of isolation isn't documented.