River features in the upper course include- waterfalls, rapids and interlocking spurs. The picture to the left shows the typical start to a river (www.geographyphotos.com). It is literally a place where water gathers together and begins to flow downhill. The erosion that takes place here is vertical. The excellent animation http://www.school-portal.co.uk/GroupDownloadFile.asp?file=55027&Groupid=12426 show a river's source.
The wonderful photo above shows a waterfall in the UK. Waterfalls form when you have a band of hard rock and soft rock, with vertical erosion. http://www.school-portal.co.uk/GroupDownloadFile.aspGroupId=12426&ResourceID=29560 is an excellent animation showing the process.
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