Circum-Superior Belt age of . Another volcanic series in the Marquette Range Supergroup, known as the Gunflint Formation, has an age of . Further geologic units that are related to the Gunflint Formation include the Badwater volcanics and the Kiernan sills. A number of origins have suggested for the Marquette Range Supergroup magmatism. This includes subsidence being driven ahead related to thrusting of the Penokean orogeny or a possible back-arc basin, and lateral flow through the Pickle Crow dikes transported magma from the Fox River Belt area through the Superior craton for placement in the Marquette Range Supergroup. This suggested long-range origin
Circum-Baikal Railway the Circum-Baikal route are attracted by the numerous nature reserves, including the rocky formations such as "Белая выемка". In the settlements along the Circum-Baikal, especially in Maritui, a number of early twentieth-century items in the modernist style are preserved. The following establishments are also located on the Circum-Baikal: The 100th anniversary of the railway was celebrated in the autumn of 2005. For this event the Baikal station was reconstructed, in which an exhibit was opened, devoted to the Circum-Baikal. The Sludyanka station was also rebuilt. Circum-Baikal Railway The Circum-Baikal Railway (, abbreviated "КБЖД") is a historical railway in the Irkutsk