The Devonian of New YorkThe Devonian of New York

Devonian or Newyorkian?Devonian or Newyorkian?The International Subcommission on The International Subcommission on

Devonian Stratigraphy visits New York Devonian Stratigraphy visits New York StateState

Devonian – the Age of FishDevonian – the Age of Fish

Trouble in ParadiseTrouble in Paradise

K-bentonites (volcanic K-bentonites (volcanic ashes) in the Helderberg ashes) in the Helderberg GroupGroup

Here we go! No, forget it.Here we go! No, forget it.Helderberg Group cut by major Helderberg Group cut by major unconformity unconformity

Overlain by Oriskany SandstoneOverlain by Oriskany Sandstone– Quartz areniteQuartz arenite

Oriskany is overlain by Tristates GroupOriskany is overlain by Tristates Group– Shale, siltstone, thin volcanic ashesShale, siltstone, thin volcanic ashes

Tristates is succeeded by Onondaga Tristates is succeeded by Onondaga LimestoneLimestone– Return to Paradise - ReefsReturn to Paradise - Reefs

Onondaga Limestone – the last of Onondaga Limestone – the last of the carbonate seasthe carbonate seas

Devonian PaleogeographyDevonian Paleogeography

Gaspe’ Peninsula, Quebec – Gaspe’ Peninsula, Quebec – Volcanic AshesVolcanic Ashes

Acadia National Park, MaineAcadia National Park, Maine

Hudson Valley, NY - FoldingHudson Valley, NY - Folding

Angular Unconformity – Hudson ValleyAngular Unconformity – Hudson Valley

Taking out the TiltTaking out the Tilt

Folded Taconic UnconformityFolded Taconic Unconformity

The Catskill Clastic WedgeThe Catskill Clastic Wedge

The Catskill Front

Flysch in the Catskill WedgeFlysch in the Catskill Wedge

Catskill MolasseCatskill Molasse

Catskill MolasseCatskill Molasse

Catskill MolasseCatskill Molasse

Channel Sandstones and Channel Sandstones and Floodplain Mudstones/ShalesFloodplain Mudstones/Shales

Large Scale Cross StratificationLarge Scale Cross Stratification

Roots in the MolasseRoots in the Molasse

Offshore in the Clastic Wedge:Offshore in the Clastic Wedge:Shale with storm-deposited Shale with storm-deposited

sand/silt bedssand/silt beds

Offshore in the Clastic Wedge:Offshore in the Clastic Wedge:Shale (with concretions)Shale (with concretions)

Examples of the rich Devonian faunaExamples of the rich Devonian fauna

Geologic Resources from the Geologic Resources from the Catskill Clastic WedgeCatskill Clastic Wedge

New York State:New York State:Birthplace of the US petroleum industryBirthplace of the US petroleum industry

Natural gas in Western New YorkNatural gas in Western New York

A Parade of EvidenceA Parade of Evidence

Volcanic AshesVolcanic Ashes

Granitic IntrusionsGranitic Intrusions

Regional Metamorphism – New EnglandRegional Metamorphism – New England

FoldingFolding

FaultingFaulting

Catskill Clastic WedgeCatskill Clastic Wedge

Acadian OrogenyAcadian Orogeny

Collision between Laurentia (North Collision between Laurentia (North America) andAmerica) and– Avalon = parts of northern Europe and U.K.Avalon = parts of northern Europe and U.K.– Peri-Gondwanan terranesPeri-Gondwanan terranes

Closure of the northern part of IapetusClosure of the northern part of Iapetus