Chemical Weathering
In Denali, and all other parks, there are both mechanical and chemical weathering. One example of chemical weathering is living organisms, specifically lichens. Lichens produce a weak acid that slowly dissolves rocks and minerals into the soil. "Lichens are often the very first life forms to colonize freshly exposed rock surfaces high in the mountains, and they immediately begin the very slow process of weathering minerals from the barren rock and incorporating them into their bodies."