arkose

Therefore an Ordovician age of the arkose is most likely.

When fresh (not exposed to the air), the arkose has a grey colour.

The sand grains making up arkose are usually coarse.

The sand often contains kaolinized feldspar, making it an arkose.

Grus sand, when cemented into a sandstone, will form an arkose.

Its cliffs, made of arkose sandstone, are a very prominent landscape feature visible for miles.

The resulting Cutler red beds are made of iron-rich arkose sandstone.

The sand grains making up an arkose may range from fine to very coarse, but tends toward the coarser end of the scale.

Roughly 200 million years ago, the New Haven Arkose began to be deposited.

Quartz-only sands are more mature than arkose or greywacke.

Fossils are rare in arkose, due to the depositional processes that form it, although bedding is frequently visible.

The bottom layer is composed of arkose sandstone, visible on Mount Sugarloaf.

The similar mineral composition of the Mutitjulu Arkose and the granite ranges to the south is now explained.

The arkose is strongly silicified and forms erosionally resistant morphological ridges.

This acquires its distinctive reddish hue when exposed to oxidation and the iron in the arkose rusts.

The bright orange-red colour of the rock surfaces comes from the oxidation (or rusting) of the iron in the arkose.

Arkosic sand is sand that is similarly rich in feldspar, and thus the potential precursor of arkose.

Uluṟu is mostly made of arkose, a hard type of sandstone that contains a lot of the mineral feldspar.

Below the Génis sericite schist follows the Puy-de-Cornut arkose.

These types of sediments are typically formed during orogenic deformation; for example, the arkose detrital sedimentary rock found in fault troughs.

This layer cemented everything together, forming the arkose over Uluṟu and the conglomerate over Kata Tjuṯa.

The change in topographic expression, color, and the facies change, from quartz arenite, to mudstone and fine-grained arkose - is gradational.

Built of arkose, a sort of sandstone, the building has an almost perfect harmony supposedly resulting from the application of the ratio of the Golden Number.

A partial femur from the Carnian Pebbly Arkose Formation of Zimbabwe was also attributed to the genus.

Uluru is dominantly composed of coarse-grained arkose (a type of sandstone characterized by an abundance of feldspar) and some conglomerate.