Catch a stone changing places
Actual timed photographs caught the Racetrack stones moving. Examine fixed references, thin ice and the observations behind the explanation.
What to keep in mind
These are annotated photographic montages, including different dates. The panel-clock span is not identical to the interval of active movement; no continuous movie is supplied here.
Use a stationary stone
Follow one moving rock across the timed panels while keeping a stationary rock as a reference. What distinguishes movement from a change in framing?
Inspect the ice around the rock
Compare the movement sequence with the ice-action montage. Where is ice pressing or breaking, and which nearby rocks do not share the motion?
Read the trail carefully
Compare a visible trail with the panel times. Which part of the movement is directly photographed, and which history would the trail alone leave unknown?