A) Due to deposition of sediments in a valley for milions of years
B) Due to accumulation of sediments in a geosyncline
C) The plains were folded into mountains
D) The sediments were folded into recumbent and nappe
A) Due to deposition of sediments in a valley for milions of years
B) Due to accumulation of sediments in a geosyncline
C) The plains were folded into mountains
D) The sediments were folded into recumbent and nappe