Talk:Rogen moraine

Notes for later inclusion

The following is a quote from The morphological characteristics of ribbed moraine by Paul Dunlop and Chris D. Clark; doi:10.1016/j.quascirev.2006.01.002; Copyright © 2006 Elsevier Ltd that summarizes "the morphological characteristics of ribbed moraine:

"1. Ribbed moraine fields are formed at a wide range of scales and vary between a few square kilometres to extremely large expanses of continuous ribbed moraine measuring several thousand square kilometres in extent.

"2. Ribbed moraine fields manifest themselves as extensive continuous fields of large size; elongate ribbons and narrow tracks; densely packed or dispersed clusters; or as isolated fields, and in some instances as cross-cutting patterns.

"3. Ribbed moraine ridges have complex plan view morphologies. In addition to displaying what are commonly thought of as ‘classic’ features (i.e. arcuate and concave down-ice, downstream-pointing horns, anatomising) they are also arcuate and concave up ice (opposite to what is usually stated), straight, rectangular, barchanoid, broad, hummocky and can be poorly formed and lack a distinct morphology.

"4. Ribbed moraine ridges are nearly always asymmetric in cross-section and are just as likely to have a steep proximal side as a steep distal side.

"5. Ribbed moraine ridges have undulating longitudinal crest profiles with multiple subcrests and resemble waves on the landscape.

"6. Ribbed moraine fields consist of ridges whose length and height vary within the field, although neighbouring ridges usually have similar dimensions.

"7. In our sample, ribbed moraine ridges varied between 17 and 1116 m wide (mean of 278 m), 1–64 m high (mean; 17 m), 45–16214 m long (mean 688 m) and had wavelengths ranging between 12 and 5800 m (mean; 505 m).

"8. Ribbed moraine ridges are commonly drumlinised and have close spatial associations with drumlins and mega-scale glacial lineations. There are spatial transitions between these forms, and ribbed moraines can be superimposed on glacial lineations and vis versa. In some rare instances lineations may be ‘ribbed’. Whether this a consequence of lineations broken up into ribbed moraines or ribbed moraine being superimposed is uncertain.

"9. Ribbed moraines are not necessarily restricted to core areas of glaciation or in a periphery around ice divides. They may possibly be generated at various times during a glacial cycle in broad swathes between the ice divide and some distance behind the margin. They are also found in the onset zones and within the main trunks of ice streams.

"10. In general, ribbed moraines are not associated with any particular topographic setting (e.g. depressions) and their occurrence is not preferentially related to up or downstream facing slopes. These findings are contrary to those often quoted in the literature." —Preceding unsigned comment added by 130.20.3.152 (talk) 16:52, 17 January 2011 (UTC)