These beds are found as interbeds between Deccan Traps layers, including the slightly older Lameta Formation.

[4][5] The mammal genera Deccanolestes, Sahnitherium, Bharattherium, Indoclemensia, Indotriconodon and Kharmerungulatum have been recovered from several localities.

[6] The Early Eocene-aged[7] Bamanbor locality in Gujarat preserves articulated freshwater fish specimens.

This means that the Intertrappean Beds are best understood as a group of different volcanic-associate formations of varying ages.

[10] Within the newly-defined Saurhastra Group (age: Paleocene to early Eocene), the following divisions were found by Patel & Shah (2023):[12]