Solution:De Terra and Paterson discovered five river terraces in the Kashmir Valley, each associated with different glacial and inter-glacial phases. Terrace I was formed due to erosion during the second inter-glacial period when climatic warming led to glacial retreat. As rivers like the Sohan began to flow more vigorously, they cut into the older deposits, resulting in the formation of
erosional terraces.
In contrast, 'Terrace II and Terrace IV were depositional, formed during glacial advances, while Terrace V corresponds to the Holocene period, representing the most recent geological epoch.