This rock unit formed when thick layers of sand built up on the ocean floor, about 41 to 47 million years ago.
https://github.com/davepinch/pinchy.cc/blob/master/content/topics/geology/rocks/tenino-sandstone/tenino-sandstone.md
Adhafera is a giant star with a stellar classification of F0 III. Since 1943, the spectrum of this star has served as one of the stable anchor points by which other stars are classified.
The grains of sand that make up the Tenino Sandstone are very small, measuring about the size of a grain of sugar.