|
gptkbp:instanceOf
|
gptkb:geological_formation
|
|
gptkbp:age
|
about 1.65 billion years
|
|
gptkbp:cementingMaterial
|
gptkb:silica
|
|
gptkbp:color
|
purple
red
pink
|
|
gptkbp:economicImportance
|
quarried for construction
|
|
gptkbp:featureType
|
quartzite
|
|
gptkbp:form
|
metamorphism of sandstone
|
|
gptkbp:fossil
|
rare or absent
|
|
gptkbp:geologicalAge
|
gptkb:Paleoproterozoic
|
|
gptkbp:location
|
gptkb:Iowa
gptkb:Minnesota
gptkb:Nebraska
gptkb:South_Dakota
|
|
gptkbp:namedFor
|
gptkb:Native_American_tribe
|
|
gptkbp:notableExposure
|
gptkb:Pipestone_National_Monument
gptkb:Blue_Mounds_State_Park
Falls Park, Sioux Falls
|
|
gptkbp:overlies
|
older Archean rocks
|
|
gptkbp:primaryLithology
|
quartz
|
|
gptkbp:resistantTo
|
highly resistant to erosion
|
|
gptkbp:size
|
fine-grained
|
|
gptkbp:stratigraphicUnitOf
|
gptkb:Midcontinent_Rift_System
|
|
gptkbp:thickness
|
up to 400 meters
|
|
gptkbp:underlies
|
Cretaceous rocks in some areas
|
|
gptkbp:usedFor
|
gptkb:building
gravel
|
|
gptkbp:bfsParent
|
gptkb:former_Minnehaha_County_Courthouse
gptkb:Blue_Mound_(hill)
|
|
gptkbp:bfsLayer
|
8
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Sioux Quartzite
|