Last year, I missed the summer solstice patterns inside Miantonomi's Cave because the show finishes an hour before sunset. This year I arrived early.
Summer solstice is the only time the face of the slanted boulder is illuminated by sunlight. The 318 degree bearing of the long axis blocks out sunlight the rest of the year. Here streaks of sunlight appear on the face and enter both windows of the cave. This picture was taken at 7:05 PM.
This is the final pattern, at 7:30. A large patch of light appears on the end of the projecting stone. This was only a thin streak of light on 4/28.
Here is the view from outside the cave. The small blue box on the ledge
is the time lapse camera. I wonder how many centuries passed with
Native people watching this display.
This is a complex pattern of light and shadow, altered by surrounding trees and passing clouds. Two markers of summer solstice may be the light on the face of the slanted boulder, and the large patch of light on the end of the projecting stone. There is also a faint mark on the wall that the sun ray follows as it travels up the wall.