Oak leaves becoming encased in mineral deposits at Saratoga Springs

We spent the Thanksgiving weekend with family in Saratoga Springs. While exploring the State Park, I came across these oak leaved as they were slowly being coated and encased by mineral deposits flowing out of one of the springs.

Panasonic Lumix GM5, Lumix 14-140m lens @ 61mm, ISO 400, f/5.2, 1/200″ exposure.