A couple of circular areas recall silos or lighthouses.
The structure of antimony and arsenic, composed of spheres that intersect along flat circular areas, is shown in Figure 9B.
Two circular areas of churned, muddy soil reveal the original sites of the metal cages around which the cattle stood to feed on the silage they contained.
These small circular areas were sometimes cut into the slope of the hill, with the spoil piled on the downhill side.
The volume of a sphere is 4/3 π r^3 and the surface of a sphere is 4πr^2 (or 4 circular areas of πr^2).
Experts say plans are still evolving, but coast-to-coast NEON could involve perhaps 15 circular areas 250 miles in diameter, each including urban, suburban, agricultural, managed and wild lands.
The colored circular areas are the coverage of identification sensors.
Black circular areas show the clusters of the LFEs.
Yellow circular areas show the areas of low-frequency earthquakes (LFEs).
Pink circular areas with dotted lines show the areas of ordinary thrust-type earthquakes.
Purple circular areas show the slow slip event (SSE) faults (Nishimura 2014).
