Alaskan Mammoth Skull, Mammuthus primigenius – Pleistocene. This skull was found in a gold mining operation in Alaska. – The tusks have natural blue, tan, and cream colors. Each tusk weighs in around 100 pounds. The front of the skull has repair because a D-9 bulldozer scraped the front surface of the skull during mining operations. This was a bull male woolly mammoth. Length: 88 inches. Height: 83 inches. Width: 47 inches.