USGS. loc. M78, south end of Chastain Ridge, Klamath Mountains: Ludlow, California
collected by R. A. Bramkamp, F. E. Turner, and C. W. Merriam 1933

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Rhynchonellata - Spiriferida - Reticulariidae
Rhynchonellata - Pentamerida
Pentameridina indet. Schuchert and Cooper 1931
"?Stricklandia or Cymbidium"
Rhynchonellata - Pentamerida - Gypidulidae
Rhynchonellata - Pentamerida - Subrianidae
Conchidium sp. Oehlert 1887
Rhynchonellata - Atrypida - Atrypidae
Atrypa sp. Dalman 1828
Plectatrypa sp. Schuchert and Cooper 1930
Rhynchonellata - Atrypida - Septatrypidae
Trilobita - Corynexochida - Illaenidae
Bumastus sp. Murchison 1839
Trilobita - Phacopida - Encrinuridae
Encrinurus sp. Emmrich 1844
Stromatoporoidea - Stromatoporoidea
Stromatoporoidea indet. Nicholson and Murie 1878
"stromatoporoids"
Anthozoa - Heliolitida - Heliolitidae
Heliolites sp. Dana 1846
Anthozoa - Heliolitida - Plasmoporidae
Plasmopora sp. Milne-Edwards and Haime 1849
Anthozoa - Favositida - Favositidae
Favosites sp. Lamarck 1816
"massive"
Anthozoa - Stauriida - Ptenophyllidae
Anthozoa - Stauriida - Kyphophyllidae
? Kyphophyllum sp. Wedekind 1927
Anthozoa - Stauriida - Stauriidae
? Palaeophyllum sp. Billings 1858
Anthozoa - Cystiphyllida - Cystiphyllidae
see common names

Geography
Country:United States State/province:California County:Siskiyou
Coordinates: 41.5° North, 122.6° West (view map)
Paleocoordinates:14.5° South, 104.6° West (Wright 2013)
Basis of coordinate:estimated from map
Altitude:3600 feet
Geographic resolution:outcrop
Time
Period: Silurian Epoch: Ludlow
10 m.y. bin: Silurian 2
Key time interval: Ludlow
Age range of interval: 426.7 - 422.7 m.y. ago
Stratigraphy
Formation:Gazelle
Stratigraphic resolution:group of beds
Stratigraphy comments: Loose fossils weather from shale near a fault, probably having come from unexposed unit 2 or topmost beds of unit 1 in the Gazelle Formation.
Lithology and environment
Primary lithology:massive lithified argillaceous "limestone"
Secondary lithology: "shale"
Includes fossils?Y
Lithology description: Collections made at east edge of massive limestone outcrop and 700 feet east of a limestone quarry. Loose fossils weather from shale near a fault, probably having come from unexposed unit 2 or topmost beds of unit 1 in the Gazelle Formation.
Environment:reef, buildup or bioherm
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Preservation of anatomical detail:good
Collection methods and comments
Collection methods:peel or thin section,field collection
Reason for describing collection:taxonomic analysis
Museum repositories:USGS
Collectors:R. A. Bramkamp, F. E. Turner, and C. W. Merriam Collection dates:1933
Metadata
Also known as:Reef 2408; Willow Creek area
Database number:79734
Authorizer:W. Kiessling Enterer:U. Merkel
Modifier:J. Marcot Research group:marine invertebrate
Created:2008-03-20 04:10:10 Last modified:2025-02-22 15:12:02
Access level:authorizer only Released:2010-03-20 04:10:10
Creative Commons license:CC0
Reference information

Primary reference:
26807. C. W. Merriam. 1972. Silurian rugose corals of the Klamath Mountains region, California. United States Geological Survey Professional Paper 738:1-50 [W. Kiessling/U. Merkel]