Platteville limestone tells deep history lessons in the Twin Cities

Platteville limestone tells deep history lessons in the Twin Cities

Platteville limestone bricks make up the Pillsbury A-Mill on Thursday, July 17, 2025 in Minneapolis, Minnesota. The building material, which formed millions of years ago from fossilized shellfish and invertebrates, was used in the early building of the Twin Cities due to its abundance and ease of transport. Credit: Ellen Schmidt/MinnPost/CatchLight Local/Report for America Once you become interested in urban design, there are certain things that…