What did the Grenville Orogeny form?
The Grenville orogeny was a long-lived Mesoproterozoic mountain-building event associated with the assembly of the supercontinent Rodinia. 1250–980 Ma) is found worldwide, but generally only events which occurred on the southern and eastern margins of Laurentia are recognized under the “Grenville” name.
Where is Grenville geological province?
The Grenville Province is a geological province of the Canadian Shield. It takes its name from the village of Grenville on the north shore of the Ottawa River in Quebec and corresponds to the Laurentides territory in the province of Quebec.
What is at the Grenville geological province?
The Grenville Province is a tectonically complex region, in Eastern Canada, that contains many different aged accreted terranes from various origins. The compositions of these terranes are unique and have distinct depleted mantle model ages. During the formation of the Grenville Province, the type of tectonism changed.
What geologic feature was formed as a result of the Grenville Orogeny?
The Grenville Orogeny was one of several Precambrian continental collisions that led to the assembly of the supercontinent Rodinia between about 1.4 billion and 900 million years ago. The supercontinent Rodinia, around 1.1 billion years ago.
What happened during the Grenville orogeny?
The Grenvillian Orogeny is named after the village of Grenville in Québec, and the term is widely used to refer to a range of Mesoproterozoic tectonic events that occurred between 1.3 and ∼1.0 Ga, resulting in development of a series of orogens that may have stretched across the globe for nearly 10 000 km.
When did the Grenville orogeny occur?
about 1.5 to 1 billion years ago
Precambrian rocks The Grenville Orogen is a deeply eroded and highly uplifted orogenic belt that extends from Labrador in northeastern Canada to the Adirondack Mountains and southwestward under the coastal plain of the eastern United States. It developed from about 1.5 to 1 billion years ago.
When did the Grenville orogeny take place?
What Orogeny means?
process of mountain formation
: the process of mountain formation especially by folding of the earth’s crust.
Where did the Grenville orogeny take place?
Canada
How old is Precambrian Shield?
Continental shield, any of the large stable areas of low relief in the Earth’s crust that are composed of Precambrian crystalline rocks. The age of these rocks is in all cases greater than 540 million years, and radiometric age dating has revealed some that are as old as 2 to 3 billion years.
Why is the Canadian Shield relatively flat?
The current surface expression of the Shield is one of very thin soil lying on top of the bedrock, with many bare outcrops. This arrangement was caused by severe glaciation during the ice age, which covered the Shield and scraped the rock clean.
Where can you find the Grenville orogeny in Scotland?
A portion of the orogen can be found in Scotland, but due to Scotland’s proximity to the Grenville province prior to opening of the Iapetus Ocean (modern day Atlantic Ocean), the two share largely the same history.
Where did the Grenville Province get its name?
The Grenville Province is a geological province of the Canadian Shield. It takes its name from the village of Grenville on the north shore of the Ottawa River in Quebec and corresponds to the Laurentides territory in the province of Quebec.
How did the Grenvillian Orogeny get its name?
The Grenvillian Orogeny is named after the village of Grenville in Québec, and the term is widely used to refer to a range of Mesoproterozoic tectonic events that occurred between 1.3 and ∼1.0 Ga, resulting in development of a series of orogens that may have stretched across the globe for nearly 10 000 km.
What was the shear zone in the Grenville orogeny?
A northwest-trending high-strain shear zone separates the dome into the Highlands to the southeast and the Lowlands to the northwest. It is believed that the shear zone (the Carthage-Colton) was a transpressional boundary during the Ottawan, when the Highlands were thrust over the Lowlands.
