The mechanics of oblique hypervelocity impact forces the "butterfly"
ejecta deposition pattern...marked by the tree fall planform...to be skewed
downrange from the impact point...Lake Cheko. The "butterfly" planform is
commonly seen, for example, around craters on Mars formed by low angle
impacts.
The data also places the epicenter of the impact at the deepest
point of Lake Cheko rather than at the assumed location southeast of the
lake.
