trough surface

trough surface

[′trȯf ‚sər·fəs]
(geology)
A surface or plane connecting the troughs of the bed of a syncline. Also known as synclinal axis; trough plane.
References in periodicals archive ?
2 mN/m during the compression of the entire trough surface area range.
Tightly controlled clearances between the trough surfaces and agitator tips further ensure fast and thorough mixing.