Specifications
Descrizione
Locality: The Smoky Hill Chalk, part of the Niobrara formation in Gove County, Kansas, U.S.A.
Description: "Kansas pop rocks" is a local name for small, rounded iron concretions found in the Smoky Hill Chalk of western Kansas. The chalk formed from fine limy mud on the floor of a Late Cretaceous sea that once covered the middle of North America, and it is famous for its marine fossils.
Concretions grow inside the sediment, and pop rocks are most common in the lower third of the chalk. Some formed around a bit of shell or other debris. They start out as pyrite or marcasite (both iron sulfide, FeS2), and once exposed they weather to a rusty rind of limonite (goethite-rich iron oxide), sometimes with yellow jarosite; some crumble over time.
The Smoky Hill Chalk is exposed in Gove County along the Smoky Hill River, Hackberry Creek and their side streams, where erosion has carved the chalk into bluffs and badlands.
These pieces are rounded nodules with a rusty to metallic surface.
In crystal traditions, these stones are associated with grounding and with the chakras.
Chemical Composition: FeS2 (pyrite/marcasite core); FeO(OH) (goethite/limonite rind)
Chakra: Root
Small
Approximate Size for 1 piece: 16mm x 19mm x 14mm
Approximate Weight for 1 piece: 10g
Medium
Approximate Size for 1 piece: 27mm x 23mm x 13mm
Approximate Weight for 1 piece: 20g
Large
Approximate Size for 1 piece: 38mm x 35mm x 32mm
Approximate Weight for 1 piece: 100g
X-Large
Approximate Size for 1 piece: 53mm x 50mm x 47mm
Approximate Weight for 1 piece: 250g
Quantity: 1pc
We do our best to buy quality products- although not every rock is the same. If you choose to purchase the "staff pick option", we will select the best of the batch for you. Otherwise, it will be at random from the larger batch we have in stock.