mesoproterozoic

The subdivisions of the Mesoproterozoic are, obviously, arbitrary divisions based on time.

The oldest rocks in Texas date from the Mesoproterozoic and are about 1,600 million years old.

The continental masses of the Mesoproterozoic are more or less the same ones that are with us today.

The early history of Massachusetts can be traced to around 1.2 to 1.1 billion years ago in the Mesoproterozoic Era.

The Mesoproterozoic was the first period of Earth's history of which a respectable geological record survives.

The impact-shocked rocks at the centre of the site are early Mesoproterozoic in age, which gives an absolute maximum possible age for the impact.

The base of the Mesoproterozoic is defined chronometrically, in terms of years, rather than by the appearance or disappearance of some organism.

The Mackenzie hotspot also resulted in the opening of the Mesoproterozoic Poseidon Ocean.

Therefore, the development of sexual reproduction in unicellular organisms during the Mesoproterozoic is thought to have precipitated the development and rise of multicellular life.

"Digital Geology of Idaho - Mesoproterozoic Belt Supergroup"

At the onset of the Neoproterozoic the supercontinent Rodinia, which had assembled during the late Mesoproterozoic, straddled the equator.

In Dalarna the basement rocks consist of granites dated as 1.6 billion years old, putting them at the boundary between the Paleoproterozoic and the Mesoproterozoic.

There is disagreement regarding the age of the sandstone, though it dates to sometime between the Mesoproterozoic Era and the Middle Cambrian.

It is subdivided into three geologic eras (from oldest to youngest): the Paleoproterozoic, Mesoproterozoic, and Neoproterozoic.

The Proterozoic eon is divided into three eras: the Neoproterozoic, Mesoproterozoic and Paleoproterozoic.

It is also part of the so-called Açungui group of caverns formed between the Mesoproterozoic and Neoproterozoic, between 1.6 billion and 542 million years ago.

The oldest rocks in Tasmania formed in the Mesoproterozoic on King Island and in the Tyennan Block.

Whereas the OFZ is a mere 90 to 70 Ma old, this megashear is ancient, having been dated to the Mesoproterozoic - about a billion years ago.

The Cape Sorell Block is a region of metamorphosed sediments from the Mesoproterozoic, to the south of the west end of Macquarie Harbour.

The basin contains thick (locally up to 12 km) marine and non-marine sedimentary rocks which were deposited from the late Paleoproterozoic to the early Mesoproterozoic (1800-1430 Ma).

The Mesoproterozoic Dripping Spring Quartzite is a resistant, purple quartzite formation found in central and southeast Arizona, USA.

Nuna continued to develop during the Mesoproterozoic, primarily by lateral accretion of juvenile arcs, and in 1000 Ma Nuna collided with other land masses, forming Rodinia.

This geology arose between 1400 Ma (million years ago) and 1000 Ma during the Mesoproterozoic, through folded and metamorphosed sediments, in what is known as the Kibaran orogeny.

Although not exclusively Proterozoic, within Australia and South America a majority of IOCG deposits are recognised to be within Neoproterozoic to Mesoproterozoic basement.

The Precambrian metamorphic and igneous rocks of the Llano Uplift probably formed during the Mesoproterozoic Grenville orogeny, which was part of the assembly of the supercontinent Rodinia.