○○○ bedrock ⪢⪢
Finally and most importantly, mountains have deformed bedrock, meaning the
layers of rock beneath the surface have been folded, faulted and tilted by the movement of Earth's crust.
http://qindex.info/i.php?x=16113
○○○ elaborate ⪢⪢
When stars with masses a bit bigger than our own sun reach the end of their life and begin to collapse to form light hot dwarf stars, they will throw off their outer
layers of matter. This matter will spread and form an elaborate cloud of gas which ...
http://qindex.info/i.php?x=19940