I found the mountain biomes on my starting land mass were missing most of that biomes creatures and reagents. 2 had only wolves and 1 didn't even have wolves. It wasn't until I sailed to another large land mass I found while sailing in the southeast, that I found a mountain biome with all the creatures (wolves, drakes, golems, fenrig) and elements such as silver and obsidian. Just try and build a campfire littered path so you can get some wolf pelts for the frost resistant cape, then explore in a ship for more large land masses.