angular unconformity , także: angular discordance

An angular unconformity (an uneven gap in the geologic record) followed.

They lie upon an angular unconformity cuts across pre-basin strata.

Below a pronounced angular unconformity one encounters the Génis porphyroid.

An angular unconformity therefore exists along the anticline's crest.

Angular unconformity: younger sediment lies upon an eroded surface of tilted or folded older rocks.

The gap in the sedimentary record, called an Angular unconformity, represents about 70 million years of non-deposition and/or erosion.

Examples of the "angular unconformity" below the Tapeats Sandstone, (approx.

Any angular unconformity is prove that a tectonic phase took place between the deposition of the layers below and on top of it.

These structures are now overlapped by Upper Albian sedimentary rocks with an angular unconformity.

Thus in Cantabria, in northern Spain, there is a clearly displayed angular unconformity at this level, followed by thick conglomerates.

An angular unconformity truncates progressively older (lower) parts of the underlying Pahrump Group starting in the southern part of the area and moving north.

Angular unconformity - an unconformity in which younger strata overlie an erosion surface on tilted of folded layered rock.

The deposition was contemporaneous to the rifting of the Valais ocean, and overlies the pre-rift rocks along an angular unconformity.

The surface of this angular unconformity truncates dipping strata comprising the folded and faulted Unkar Group.

The horizontal Tonto Group units are laid upon the Vishnu Group which is at an angular unconformity of about 15 degrees.

Today we see the evidence of this erosion in the Black Hills, where the metamorphic rocks end in an angular unconformity below the younger sedimentary layers.

The formation dips at 15 degrees (20, to 12 degrees), and the contact between it and the overlying Cambrian formations is an angular unconformity.

The contact with the overlying Middle Devonian lacustrine Lower Stromness Flagstones is an angular unconformity.

Besides the erosion unconformity, the Unkar Group of the basement rocks are also at an angular unconformity, being an 8-member sequence tilted at 45 degrees.

When new sedimentary layers are deposited on top of tilted ones, they will have an angle with the older ones, a structure which is called an angular unconformity.

This uplift of the basin, near the end of the Westphalian, halted deposition and created the angular unconformity at the top of the Karadon Fm.

Vallis Vale exposes some of Britain's most classic rock outcrops, exhibiting several of the most easily demonstrated examples of angular unconformity available.

Second, an angular unconformity, with a dip of less than 10 , separates the base of the Nankoweap Formation from the underlying Unkar Group.

Brandriss, M. (2004) Angular unconformity between Proterozoic and Cambrian rocks, Grand Canyon, Arizona.

Overlying these, and separated by an angular unconformity, are mostly horizontally bedded Mesozoic sedimentary rocks, including the cliff-forming Wingate Sandstone.