tiles


Note:  Do not rely on this information. It is very old.

Synclinal

Synclinal, or trough, a downward fold in a aeries of strata, or, technically, when two portions of one or more strata are so folded as to dip from opposite directions towards a central depressed axis. This axis will necessarily be the line of strike. Owing to the compression along this line on the upper surface of beds thus folded, the synclinal is a durable form, resisting denudation; and many mountains and hills, such as Snowdon, have this structure. All our coal-fields are preserved in synclinal folds, and they are essential in the formation of artesian wells (q.v.).