Explanation: The Indian Desert

• To the northwest of the Aravali hills lies the Great Indian desert.
• It is a land of undulating topography dotted with longitudinal dunes and barchans.
• This region receives low rainfall below 150 mm per year; hence, it has arid climate with low vegetation cover.
• It is because of these characteristic features that this is also known as Marusthali.
• It is believed that during the Mesozoic era, this region was under the sea. This can be corroborated by the evidence available at wood fossils park at Aakal and marine deposits around Brahmsar, near Jaisalmer.

Source: Class 11th NCERT