description Janisjarvi Overview
Janisjärvi is a meteorite impact structure in the Republic of Karelia in northwestern Russia. The structure is associated with Lake Janisjärvi and has an estimated diameter of about 14 kilometers. Its formation is generally placed in the late Proterozoic, making it a deeply eroded geological feature whose original crater form has been modified by later geological processes.
help Janisjarvi FAQ
Where is Janisjärvi impact structure?
Janisjärvi is in the Republic of Karelia in northwestern Russia. It is associated with Lake Janisjärvi.
How wide is Janisjärvi structure?
The estimated diameter is about 14 kilometres. Its present form has been deeply eroded, so the original crater is not preserved as a fresh surface bowl.
How old is Janisjärvi crater?
Its formation is generally placed in the late Proterozoic. That means the impact occurred hundreds of millions of years ago, before the Cambrian period.
Is Lake Janisjärvi itself an impact crater?
Lake Janisjärvi is associated with the Janisjärvi impact structure, but the geological feature is larger than simply the visible water surface. The estimated structure is about 14 kilometres across.
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