Oregon thundereggs
E707559
Oregon thundereggs are distinctive, often colorful agate-filled nodules considered the state rock of Oregon and prized by collectors for their striking internal patterns.
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
geologic formation
ⓘ
state rock ⓘ thunderegg ⓘ |
| associatedWith |
Ochoco National Forest
NERFINISHED
ⓘ
Priday Ranch thunderegg beds NERFINISHED ⓘ Richardson’s Rock Ranch NERFINISHED ⓘ |
| collectingActivity | rockhounding ⓘ |
| color |
blue
ⓘ
brown ⓘ gray ⓘ purple ⓘ red ⓘ white ⓘ yellow ⓘ |
| composedOf |
agate
ⓘ
chalcedony ⓘ silica ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| designatedAs | official state rock of Oregon ⓘ |
| designationYear | 1965 ⓘ |
| formationProcess | silica-rich fluids filling gas bubbles in volcanic rocks ⓘ |
| foundIn |
Crook County, Oregon
NERFINISHED
ⓘ
Deschutes County, Oregon NERFINISHED ⓘ Jefferson County, Oregon NERFINISHED ⓘ Malheur County, Oregon NERFINISHED ⓘ Wheeler County, Oregon NERFINISHED ⓘ |
| geologicEnvironment |
rhyolitic lava flows
ⓘ
rhyolitic volcanic ash flows ⓘ |
| innerAppearance |
banded chalcedony structures
ⓘ
colorful agate patterns ⓘ geode-like cavities ⓘ |
| legalStatus | collecting regulated on public lands ⓘ |
| locatedIn | Oregon ⓘ |
| mineralClass | silicate ⓘ |
| notableFor |
popularity among rock collectors
ⓘ
striking internal patterns ⓘ varied colors of agate fillings ⓘ |
| outerAppearance | rough and nondescript rock nodule ⓘ |
| polishability | takes a high polish ⓘ |
| scientificInterest | examples of secondary silica deposition in volcanic terrains ⓘ |
| texture | cryptocrystalline ⓘ |
| tourismRole | attract rockhounds and geotourism to Oregon ⓘ |
| typicalShape | roughly spherical nodule ⓘ |
| typicalSize | a few centimeters to over 20 centimeters in diameter ⓘ |
| usedFor |
cabochons
ⓘ
decorative display specimens ⓘ lapidary work ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.