Thunder… Thunder… Thundereggs!
Quote: According to ancient Native American legend, when the Thunder Spirits living in the highest recesses of snowcapped Mount Hood and Mount Jefferson became angry with one another, amid violent thunder and lightning storms they would hurl masses of these spherical rocks at each other. The hostile gods obtained these weapons by stealing eggs from the Thunderbirds’ nests, thus the source of the name “Thundereggs.” -Rock Hounding.
In 1965, the thunderegg (proud owners, one and all, of the greatest name ever bestowed on a rock by we fleshy types) was designated as the Oregon state rock. More info: 1, 2, 3, 4. More images: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10.