impersistent

impersistent

(ˌɪmpəˈsɪstənt)
adj
not persistent
References in periodicals archive ?
This formation consists of blue-grey shale, occasionally gypsiferous, with one or two impersistent limestone horizons.
6 m) impersistent reddish-gray mudstone within ooid grainstones in the Bangor Limestone, approximately 1100 feet above the base of the Mississippian section, is interpreted as a paleosol (B horizon) and a possible sequence boundary.
Higher conglomerates and coarse sandstone beds in predominant mudrock again show evidence of shallow stream deposits, probably laid down as laterally impersistent lenses.