Synonymer & Information om | Engelska ordet PRECAMBRIAN

Exempel på hur man kan använda PRECAMBRIAN i en mening

• It is the last period of the Proterozoic Eon as well as the last of the so-called "Precambrian supereon", before the beginning of the subsequent Cambrian Period marks the start of the Phanerozoic Eon, where recognizable fossil evidence of life becomes common.
• The Precambrian is so named because it preceded the Cambrian, the first period of the Phanerozoic Eon, which is named after Cambria, the Latinized name for Wales, where rocks from this age were first studied.
• It is preceded by the Archean and followed by the Phanerozoic, and is the most recent part of the Precambrian "supereon".
• Covering most of the island, the coastal sedimentary plateau is a succession of highly eroded sedimentary peaks which are part of the Franklinian Shield with an extension of the Canadian Shield (Precambrian igneous and metamorphic rocks) in the island's southeastern corner.
• Its bedrock is formed of Cretaceous shale, sandstone and clay that lie above the pinkish-red Upper Precambrian Sioux Quartzite.
• The bedrock of Harris is largely Lewisian gneisses, which were laid down in the Precambrian period, interspersed with igneous intrusions.
• North and west of this line are the older, generally harder rocks including igneous and metamorphic rocks and the Palaeozoic and Precambrian sandstones and limestones which usually stand out as upland areas.
• Arkarua adami is a small, Precambrian disk-like fossil with a raised center, a number of radial ridges on the rim, and a five-pointed central depression marked with radial lines of five small dots from the middle of the disk center.
• The park's rock formations, made famous by Robert Stevens and Harold Williams, include oceanic crust and mantle rock exposed by the obduction process of plate tectonics, as well as sedimentary rock formed during the Ordovician, Precambrian granite and Palaeozoic igneous rocks.
• It consists of fragments of island arcs and continental crust accreted to the south-eastern edge of Precambrian North American, Laurentia.
• Mount Mitchell was formed during the Precambrian when marine deposits were metamorphosed into gneiss and schist.
• The Thousand Islands – Frontenac Arch region or the Frontenac Axis is an exposed strip of Precambrian rock in Canada and the United States that links the Canadian Shield from Algonquin Park with the Adirondack Mountain region in New York, an extension of the Laurentian mountains of Québec.
• Geologically, the valley is a wide faulted syncline of sedimentary rocks, sitting between the predominantly Precambrian igneous rocks of the Front Range to the east and the Sawatch Uplift to the west.
• It is formed of Precambrian gneiss that remains after numerous glaciation cycles have scoured and reformed the surrounding terrain.
• Migmatite is a composite rock found in medium and high-grade metamorphic environments, commonly within Precambrian cratonic blocks.
• 7 billion years BP – in the Paleoproterozoic Era during Precambrian times, during the Statherian period – and continued for a few hundred thousand years, probably averaging less than 100 kW of thermal power during that time.
• The village lies within the Gull River valley on the ridge between the Paleozoic Limestone region of South-Central Ontario and the Precambrian Granite Canadian Shield.
• The cliffs around Bude are the only ones in Cornwall that are made of Carboniferous sandstone, as most of the Cornish coast is formed of Devonian slate, granite and Precambrian metamorphic rocks.
• The subdued topographic basin is underlain by Precambrian rocks and bordered by a discontinuous rim of flat-topped hills.
• The Precambrian gneiss and schist that make up the majority of the steep walls of the Black Canyon formed 1.

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