Michigan Official State Dirt, Soil, Kalkaska Sand

Michigan has its fair share of ‘Official’ state items and things.
Such as:

State bird: American robin
State fish: Brook trout
State flower: Apple blossom
State fossil: Mastodon
State game mammal: White-tailed deer
State gem: Chlorastrolite (Isle Royale greenstone)
State native grain: Manoomin (wild rice)
State reptile: Painted turtle
State Song: ‘My Michigan’
State stone: Petoskey stone
State tree: White pine
State wildflower: Dwarf Lake iris

But did you know Michigan had an official state dirt? Well, they refer to it as “soil”, but dammit, it’s still dirt.

That would be Kalkaska Sand (or Dirt...or Soil), first identified in 1927. The color could be anywhere from black, brown, tan, yellow, or a mixture. Michigan has 500 different soils, but Kalkaska Sand is only found in our state and its layers range from two to four feet deep.

It became our state soil in 1990 and covers approximately one million acres throughout various counties in Michigan’s Upper and Lower Peninsulas.

What's so great about it that it should be our official dirt? Wikipedia says Kalkaska soil is "well-drained and effectively filters water.....It is also largely responsible for the remarkable water quality of lakes and rivers located in areas of the state."
Okay. I'll buy that.