SINE

Past a certain age, we forget birthdays, maybe because we would rather be young enough for birthdays to be exciting like before. Vishnu Schist at bottom of Canyon is very old and has had its share of hard times and pressure. The rock higher up is newer and younger, until the top is in sunshine and breezes of each new day.

I include links about rock birthdays. Here is the birthday lineup in brief in some links from this note. Here is some detail about when and how each layer was born. And here are pictures of different ages of rock. You can tell them apart from the different colors of their birthday suits.