noun
- Lines on a map connecting points of equal thickness of a rock layer, sediment, or ice sheet.
Usage: technical; geology; plural form of isopach
Examples
- Geologists used isopachs to map the thickness variations of the sandstone formation across the region.
- The isopachs on the stratigraphic diagram showed where the sediment layer was thickest.
- By drawing isopachs, researchers could identify depositional patterns in the ancient basin.
- The ice sheet's isopachs revealed significant thinning near the margins.