Original: The Shyok River, a tributary of the Indus River, originates from the Rimo Glacier, one of the tongues of Siachen Glacier.
Simplified: Shyok river (a tributary of the Indus) originates from the Rimo glacier, one of the tongues of Siachen Glacier and becomes very wide at the confluence with the Nubra River (a tributary of Shyok, originating from Siachen Glacier).