Templeton - Highway 46 Thundereggs
Templeton, CA. This is a rare and somewhat confusing location. The Highway 46 bed is located, not surprisingly, on Highway 46 between Templeton and Cambria and is apparently still accessible. They are characterized by an extremely free-form shape, sometimes very complicated and bering a certain resemblance to Mushroom Ryolite.
However, there is another, rather more infamously rare thunderegg from this area known as the Templeton Biconoids, characterized by much neater structures and a significantly different colour matrix, verging towards salmon pink. The speculation goes that these two locations are one and the same, or at least from the same area, though this in not known for sure - the Biconoids being specimens that have weathered out of the original bed and become scattered. Allowing for a certain amount of variation within the bed and for the influences of the new environment on the Biconoids (including sunlight), this seems plausible. These Biconoids are almost unobtainable now, since much of the surrounding land is inaccessible or built over, which is a shame because they are very interesting stones. I don't have a known illustration of one that I can publish here.