Shiwalik Hills

Also called Churia or Margalla Hills. Intermittent outermost range of foothills extending across Himalayan region through Pakistan, India, Nepal and Bhutan. Consists of many sub-ranges. Summits generally 600 to 1,200 meters. Steeper southern slopes form along a fault zone called Main Frontal Thrust; northern slopes are gentler. Permeable conglomerates and other rocks allow rainwater to percolate downslope into the Bhabhar and Terai, supporting only scrubby forests upslope.