Portlandian

Portlandian

[pȯrt′land·ē·ən]
(geology)
A European geologic stage of the Upper Jurassic, above Kimmeridgian, below Berriasian of Cretaceous.
References in periodicals archive ?
8 mmbbls of possible gross un-risked prospective oil in place were estimated in the Lower Portlandian Sandstone, in what was believed at the time to be an untested fault block to the south of the well.
It grows on mean, stony soil on a bed of Kimmeridgian or sometimes Portlandian clay and limestone, the essence of which seems to seep into the wine to give it a bracingly mineral tang.
The soils differ, too, classically comprising Kimmeridgian clay, a chalky marl containing fragments of fossilised oyster shells, with some Portlandian stone.