शैल-इकाई इसके अंग्रेजी अर्थ का उदाहरण

The caldera is also known to have extensive outcrops of a very unusual lava-like rock unit, called the Pagosa Peak Dacite, made of dacite that is very similar to that of the Fish Canyon Tuff.

Given the detrital nature of the rock unit, the zircons are sourced from pre-existing rocks which were then weathered and the resultant sediment deposited as sedimentary rock.

East of Government Peak and the Little Susitna River the mafic rock unit is in contact with the Arkose Ridge Formation to the south and the felsic plutons to the north.

Chronostratigraphy relies heavily upon isotope geology and geochronology to derive hard dating of known and well defined rock units which contain the specific fossil assemblages defined by the stratigraphic system.

In this case, it is often likely that the crenulation acts as a shear plane and it may be difficult to reconstruct earlier foliations and rock units across the crenulation foliation.

Despite being rich in dinosaur fossils, the only other sauropod from this rock unit is Nemegtosaurus, which is known from a single skull.

In this section the component rock units of the Gascoyne Complex, and the orogenies that shaped the complex, are discussed in order of decreasing age.

This rock unit is exposed only in the Glenburgh Terrane at the southern end of the Gascoyne Complex.

This rock unit is known only from the Glenburgh Terrane.

The Gascoyne Complex rocks, namely the Yarlarweelor Gneiss are thrusted eastward onto the upper rock units of the Bryah Basin and the whole succession of the Padbury Basin.