The Indian desert also known as Marusthali is believed to be under the sea during which one of the following eras?

The Indian desert, also known as Marusthali, is geologically believed to have been submerged under the sea during the Mesozoic era. While some sources suggest marine transgressions during the late Palaeozoic (Permian period), the most significant geological evidence in the Thar Desert, particularly in the Jaisalmer basin, points to the Mesozoic era. This is supported by the presence of Jurassic and Eocene limestone and sandstone formations. The region contains marine sedimentary rocks and fossils, such as those found in the Akal Wood Fossil Park, which date back to the Jurassic period of the Mesozoic era. These deposits indicate that the area was once a shallow sea before tectonic shifts and climatic changes led to its current arid state. The desert's basement consists of Precambrian rocks, but the marine sequences that define its 'under the sea' history are primarily Mesozoic and early Cenozoic.