Scoil: Cluain Tuaiscirt (uimhir rolla 1405)

Ar an leathanach seo

1. Rivers

   

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   Rivers

   Let us briefly recall what, no doubt, many of you already know, is the way in which a river is formed. The rain falling on the uplands runs, in part, down the slopes to join an existing brook, or sinks, in part, into the ground, until it is stopped by some layer, such as hard rock or clay, which it cannot penetrate. Here is gathers in a pool until pressure forces it to seek an outlet and it issues from the hillside in a trickling stream, which is often the source of a river. Even the

   

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