The allochthonous Tripon Pass Limestone (new name) in the Windermere Hills, northeastern Elko County, Nevada, consists of 1,550 ft of clastic limestone and interbedded argillite, quartz siltite and arenite, and quartz-chert arenite. The Tripon Pass Limestone overlies the Devonian Guilmette Formation, probably disconformably, and is overlain conformably by the Diamond Peak Formation. The Tripon Pass Limestone contains Kinderhookian (Early Mississippian) conodonts; those at the top of the formation are latest Kinderhookian.

Sedimentary structures in the Tripon Pass Limestone suggest that at least part of the formation was deposited by turbidity currents. Turbidity current activity probably resulted from tectonism in part of the Cordilleran miogeosyncline contemporaneous with an early stage of the Antler orogeny in the Cordilleran eugeosyncline on the west.

Allochthonous rocks tentatively assigned to the Chainman Formation, structurally separate from the Tripon Pass Limestone and associated formations, also contain Kinderhookian conodonts. If the conodonts reflect the true age of the Tripon Pass Limestone (and lowermost Diamond Peak Formation) and Chainman Formation, which is probable, then complex facies relations between Mississippian terrigenous clastic and carbonate rocks in the Cordilleran geosyncline are implied. Such relations can be clarified only by detailed lithostratigraphic and biostratigraphic work, but clarification may lead to the discovery of petroleum reservoirs.