Some people experience intense aversion and anxiety when they see clusters of
roughly circular shapes, such as the bubbles in a cup of coffee or the holes in a sponge.
These currents would bulldoze the dense, chemically distinct rock toward the plumes, and, over time, they could pack it into
a roughly circular shape.
Not exact matches
The informally named Piccard Mons (5.5 kilometres tall) and Wright Mons (3.2 kilometres tall) both have the same
shape as volcanoes we see on Earth:
roughly circular mountains with pits in their centres.
Roughly 5,000 years ago, Egyptians would use rings because of the
circular shape.