At https://malagabay.wordpress.com/2016/01/21/carbon-14-the-baikal-excursions/ … this is an interesting read but not sure what to make of his train of thought. From the perspective of somebody highly sceptical of the Settled Science agenda Tim Cullen is always worth browsing. Lake Baikal in Siberia is 395 miles long and 49 miles wide – and is the deepest lake in the world at 1642m. Local legend is reputed to say the lake is not 25 million years of age, per mainstream, but was formed when a huge stone fell out of the sky that shook the Earth. Fire and smoke and various other catastrophic occurrences then followed – and finally it filled up with water. See www.prosv.ru/umk/spotlight/info.aspx?ob_no=32372
According to Wiki it is the world's oldest surviving lake – how can the two things be squared? See also http://pubs.usgs.gov/fs/baikal/
Hot springs are present both around and within Lake Baikal yet no evidence of volcanism has been found. It has occurred beyond Lake Baikal in what is known as the Baikal Rift Zone – but methane seeps and mud volcanoes have occurred at the vicinity of the lake. (http://geology.gsapubs.org/content/30/7/631.abstract) In 1862 an earthquake shook the region south of Lake Baikal beginning with a wave like movement of the Earth – it was over the 10 mark on the Richter Scale. See http://irkipedia.ru/content/devastating_earthquake_and_bay_proval_baikal
The bottom of the lake is 1186m below sea level but below that is a thick layer of sediments. Earthquakes are common in the region – sometimes causing the bottom of the lake to sink even further. The bottom is also covered in a thick sediment on what is the deepest continental rift in the world – see http://pubs.usgs.gov/fs/baikal/ … and two sediment cores have been extracted and this has revealed changes in C14 age and sedimentation rates during the transition from the last glacial to the Holocene. So, what happened at the transition – is it possible Lake Baikal was thrust into a colder environment?