Additionally, the waters of the lakes are remarkably clear.
This is owning to the year long low temperatures that prohibit the growth of planktons.
The rocks range in color from dark red to maroon, and from green to blue.
Colored pebbles are seen in abundance on the shores of Lake McDonald on the western side of the park.
Lake McDonald is the largest of the lakes of Glacier National Park with a surface area of 6,823 acres.
Rocks with this coloration often have old ripple marks or ancient mud crack lines.
The rich green-colored rocks were formed in deeper water than the red rocks.
These rocks are actually all around Glacier National Park, and were formed at different eras.
When the glaciers came, it broke down the rocks into tiny fragments and the rivers washed them away.
Water erosion then rendered them into smooth pebbles.
