Absolutely beautiful work.
Couple of notes:
First, the 'forest belt' in Russia extends down to about 100 kilometers south of Moscow, the modern line of Tula - Kazan, and northern France and most of Germany would be almost solid Forest - Scientific American had an article last year on the spread of the Oak family of trees at the end of the last glaciation period across Europe and North America on the extent.
And it's a shame the game doesn't (yet!) allow changes in the Biome/terrain, because at the nominal 'start of game' in 15,000 BCE, the Sahara was grassy plains with lots of rivers and lakes - it didn't 'dry out' until about 4000 BCE. There was a huge glacial lake covering most of central Canada (Lake Ojibway and its predecessors) which burst its ice dam and disappeared about 6000 - 6200 BCE, and Britain in 15,000 was still part of the European land mass - the channel and the North Sea didn't appear completely in modern form until about 6500 BCE. There was also an 'extra' large shallow lake/sea between the Caspian and Black Seas that drained into the Black Sea between 11000 and 8000 BCE, 'filling up' the Black Sea to its present dimensions. And of course, until the last of the glaciation period, the sea levels in general were as much as 200 feet lower than now, so the coast lines would be, in places, wildly different. Hopefully, the game will get more in-game variation possible, especially early in the Ages, with a Patch/DLC.
Obsidian and Lead were both available in the Ancient Age in southern Anatolia.
Copper was worked from deposits in the Caucasus Mountains by both the Maikop Culture to the north and the Mesopotamia early Civs/Factions like Sumer and Babylon. And one of the largest accessible Copper deposits in the world was at the western end of the Great Lakes, that was accessed by Native Americans 1000s of years before Contact with Europeans.
Spain was a major source of Copper, Lead, Silver and Iron in Ancient and Classical Ages
The historically significant Silver deposits were in Greece, central Europe (Bohemia), South America (Bolivia), and western North America (Nevada, the 'Comstock Lode')
It would be really nice to have 'progressive revelation' of deposits in the game. That way you could have Visible Deposits of Oil in southern Mesopotamia and the Caucasus (Baku) (surface naptha/bitumin 'springs') and western North America (La Brea in California) from Start of Game, then add other Oil Deposits later, ending with the undersea fields in the North Sea and Caribbean in the late Contemporary Age