Pioche Shale
Encyclopedia
The Pioche Shale is an Early to Middle Cambrian Burgess shale-type
Lagerstätte
in Nevada
.
It spans the Early–Middle Cambrian boundary; fossils from the Early Cambrian are preserved in botryoidal haematite, whereas those from the Middle Cambrian are preserved in the more familiar carbon films, and very reminiscent of the Chengjiang County
preservation.
It preserves arthropods and worms familiar from the Burgess Shale
.
It spans the early Cambrian Olenellus
and basal Middle Cambrian Eokochaspis nodosa trilobite zone
s.
Burgess shale type preservation
The Burgess Shale of British Columbia is famous for its exceptional preservation of mid-Cambrian organisms. Around 40 other sites have been discovered of a similar age, with soft tissues preserved in a similar, though not identical, fashion...
Lagerstätte
Lagerstätte
A Lagerstätte is a sedimentary deposit that exhibits extraordinary fossil richness or completeness.Palaeontologists distinguish two kinds....
in Nevada
Nevada
Nevada is a state in the western, mountain west, and southwestern regions of the United States. With an area of and a population of about 2.7 million, it is the 7th-largest and 35th-most populous state. Over two-thirds of Nevada's people live in the Las Vegas metropolitan area, which contains its...
.
It spans the Early–Middle Cambrian boundary; fossils from the Early Cambrian are preserved in botryoidal haematite, whereas those from the Middle Cambrian are preserved in the more familiar carbon films, and very reminiscent of the Chengjiang County
Chengjiang County
Chengjiang County is located in Yuxi, Yunnan Province, China, just north of Fuxian Lake....
preservation.
It preserves arthropods and worms familiar from the Burgess Shale
Burgess Shale
The Burgess Shale Formation, located in the Canadian Rockies of British Columbia, is one of the world's most celebrated fossil fields, and the best of its kind. It is famous for the exceptional preservation of the soft parts of its fossils...
.
It spans the early Cambrian Olenellus
Olenellus
Olenellus is a genus of trilobite that lived during the Early Cambrian. It is commonly found in areas of Europe and North America...
and basal Middle Cambrian Eokochaspis nodosa trilobite zone
Trilobite zone
Trilobites are used as index fossils to subdivide the Cambrian period. Assemblages of trilobites define trilobite zones. The Olenellus zone has traditionally marked the top of the Lower Cambrian, and is followed by the Eokochaspis zone....
s.