Geography - Formation of a drumlin?

CHAD

Hey
Just wondering how a drumlin forms?
thanx!

Reply 1

TheWolf

intense sediment deformation?

Reply 2

CHAD

GCSE Level btw.

Reply 3

JamesF

It is thought that they are formed by a glacier which started retreating, and so formed a morain, and then began advancing again, over the top of the morain, erroding it down to the teardrop shape.

Reply 4

CHAD

JamesF

It is thought that they are formed by a glacier which started retreating, and so formed a morain, and then began advancing again, over the top of the morain, erroding it down to the teardrop shape.

isnt morraine just like particles of rock and dirt and stuff, doesnt actually cause a drumlin 2 form.

Reply 5

CHAD

PLEASE! Sum1 must know!!!

Reply 6

Geogger

CHAD

PLEASE! Sum1 must know!!!

Drumlins are small oval mounds up to 1.5 Km long and 100 metres high but can be much smaller. The are often found in groups called swarms. eg of locations are the Ribble Valley in N England
They are deposited due to friction between the ice and the underlying geology, causing the glacier to drop its load. As the glacier continues to advance it streamlines the mounds into a "basket of eggs" topography. these features can be used to determine the direction of glacier movement - the pointed end of the "eggs" shows the way the glacier was advancing.