A NEW AGE CONSTRAINT ON LATE JURASSIC MAGMATISM AND SEDIMENTATION IN THE COON HOLLOW FORMATION (WALLOWA TERRANE)

NEW AGE AND GEOCHEMICAL PERSPECTIVE ON LATE JURASSIC DIKE SWARMS OF THE SW MOJAVE

10.1130/abs/2016cd-274602 ◽

2016 ◽

Author(s):

Anne A. Fulton ◽

◽

Jade Star Lackey ◽

Kyle R. McCarty ◽

Juliet Ryan-Davis ◽

...

Keyword(s):

Late Jurassic ◽

New Age ◽

Dike Swarms

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Petrological vestiges of the Late Jurassic-Early Cretaceous transition from rift to back-arc basin in southernmost Chile: New age and geochemical data from the Capit^|^aacute;n Aracena, Carlos III, and Tortuga ophiolitic complexes

GEOCHEMICAL JOURNAL ◽

10.2343/geochemj.2.0235 ◽

2013 ◽

Vol 47 (2) ◽

pp. 201-217 ◽

Cited By ~ 23

Author(s):

M. CALDER^|^Oacute;N ◽

C. F. PRADES ◽

F. HERV^|^Eacute; ◽

V. AVENDA^|^Ntilde;O ◽

C. M. FANNING ◽

...

Keyword(s):

Early Cretaceous ◽

Late Jurassic ◽

New Age ◽

Geochemical Data ◽

Back Arc ◽

Carlos Iii

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Triassic sponges (Sphinctozoa) from Hells Canyon, Oregon

Journal of Paleontology ◽

10.1017/s0022336000018333 ◽

1988 ◽

Vol 62 (03) ◽

pp. 419-423 ◽

Cited By ~ 6

Author(s):

Baba Senowbari-Daryan ◽

George D. Stanley

Keyword(s):

Endemic Species ◽

Upper Triassic ◽

Island Arc ◽

Tropical Island ◽

The Family ◽

Wallowa Terrane ◽

Unique Condition ◽

Hells Canyon

Two Upper Triassic sphinctozoan sponges of the family Sebargasiidae were recovered from silicified residues collected in Hells Canyon, Oregon. These sponges areAmblysiphonellacf.A. steinmanni(Haas), known from the Tethys region, andColospongia whalenin. sp., an endemic species. The latter sponge was placed in the superfamily Porata by Seilacher (1962). The presence of well-preserved cribrate plates in this sponge, in addition to pores of the chamber walls, is a unique condition never before reported in any porate sphinctozoans. Aporate counterparts known primarily from the Triassic Alps have similar cribrate plates but lack the pores in the chamber walls. The sponges from Hells Canyon are associated with abundant bivalves and corals of marked Tethyan affinities and come from a displaced terrane known as the Wallowa Terrane. It was a tropical island arc, suspected to have paleogeographic relationships with Wrangellia; however, these sponges have not yet been found in any other Cordilleran terrane.

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