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Gatún Formation

January 01, 1970

Not to be confused with Gatuncillo Formation.

The Gatún Formation (Tg)[1] is a geologic formation in the Colón and Panamá Provinces of central Panama. The formation crops out in and around the Panama Canal Zone. The coastal to marginally marine sandstone, siltstone, claystone, tuff and conglomerate formation dates to the latest Serravallian to Tortonian (Clarendonian to Hemphillian in the NALMA classification), from 12 to 8.5 Ma.[2][3] It preserves many fossils, among others, megalodon teeth have been found in the formation.

Gatún Formation
Stratigraphic range: Latest Serravallian-Tortonian
(Clarendonian-Hemphillian)
~12–8.5 Ma
↓
TypeFormation
Underliesalluvium
OverliesCaimito Formation, unnamed Cretaceous volcanics
Lithology
PrimarySandstone, siltstone
OtherTuff, conglomerate
Location
Coordinates9°18′N 79°48′W / 9.3°N 79.8°W / 9.3; -79.8
Approximate paleocoordinates8°54′N 78°06′W / 8.9°N 78.1°W / 8.9; -78.1
RegionColón Province
Country Panama
ExtentPanama Basin
Type section
Named forLake Gatún
Named byHowe
Year defined1907
Gatún Formation (Panama)

Description edit

The Gatún Formation was first defined and named as such by Howe in 1907. The formation was known before and when William Phipps Blake traveled across Panama in 1853 on his way to California to join one of the transcontinental railroad surveying parties, he collected a few Gatún Formation fossils.[4] In the Canal Zone the contact between the formation with the underlying Caimito Formation is covered by the waters of Lake Gatún and even before the flooding of the lake perhaps all of the contact was concealed by swamps.[5]

Massive medium- to very fine-grained sandstones and siltstones are the chief constituents of the Gatún Formation. They are somewhat calcareous, or marly, somewhat tuffaceous, and have a clay-like matrix. The sandstone contains numerous grains of black and greenish volcanic rocks and is practically a subgraywacke. Conglomerates and hard brittle very fine-grained tuff make up a small part of the formation. Basalt intrudes older formations in the Lake Gatún area, but is not known to penetrate the Gatún Formation.[5]

Fossil content edit

See also edit

References edit

  1. ^ Geologic Map, 1980
  2. ^ Aguilera et al., 2017, p.5
  3. ^ Gatún Formation at Fossilworks.org
  4. ^ Woodring, 1957, p.42
  5. ^ a b Woodring, 1957, p.43
  6. ^ a b c d e f g h i Landau et al., 2012
  7. ^ Aguilera et al., 2017
  8. ^ Hendricks, 2018
  9. ^ a b Aguilera et al., 2016
  10. ^ Schwarzhans & Aguilera, 2013
  11. ^ Schwarzhans & Aguilera, 2016

Bibliography edit

  • Aguilera, Órangel; Guilherme Oliveira Andrade Silva; Ricardo Tadeu Lopes; Alessandra Silveira Machado; Thaís Maria Dos Santos; Gabriela Marques; Thayse Bertucci; Thayanne Aguiar, and Jorge Carrillo Briceño and Felix Rodríguez, Carlos Jaramillo. 2017. Neogene Proto-Caribbean porcupinefishes (Diodontidae). PLoS ONE 12(7). 1–26. Accessed 2019-02-09.
  • Aguilera, Órangel A.; Werner Schwarzhans, and Philippe Béarez. 2016. Otoliths of the Sciaenidae from the Neogene of tropical America. Palaeo Ichthyologica 14. 7–90. Accessed 2019-02-09.
  • Beu, A.G. 2010. Neogene Tonnoidean Gastropods of Tropical and South America; contributions to the Dominican Republic and Panama Paleontology Projects and Uplift of the Central American Isthmus. Bulletins of American Paleontology 377-378. 1–550. Accessed 2019-02-09.
  • Cadena, E.; J.R. Bourque; A.F. Rincón; J.I. Bloch; C.A. Jaramillo, and B.J. MacFadden. 2012. New turtles (Chelonia) from the late Eocene through Late Miocene of the Panama Canal Basin. Journal of Paleontology 86. 539–557. Accessed 2019-02-09.
  • Hendricks, Jonathan R. 2018. Diversity and preserved shell coloration patterns of Miocene Conidae (Neogastropoda) from an exposure of the Gatun Formation, Colón Province, Panama. Journal of Paleontology 92(5). 804–837. Accessed 2019-02-09.
  • Landau, Bernard; Richard E. Petit, and Carlos M. Da Silva. 2012. New Cancellariidae (Mollusca, Gastropoda) from the Miocene Gatun Formation of Panama, with Eleven New Species. Journal of Paleontology 86(6). 907–930. Accessed 2019-02-09.
  • Schwarzhans, Werner, and Órangel Aguilera. 2016. Otoliths of the Ophidiiformes from the Neogene of tropical America. Palaeo Ichthyologica 14. 91–124. Accessed 2019-02-09.
  • Schwarzhans, Werner, and Órangel Aguilera. 2013. Otoliths of the Myctophidae from the Neogene of tropical America. Palaeo Ichthyologica 13. 83–150. Accessed 2019-02-09.
  • Woodring, W.P. 1957. Geology and Paleontology of Canal Zone and Adjoining Parts of Panama - 306A Geology and description of Tertiary mollusks (Gastropods: Trochidae to Turritellidae), 1–186. USGS. Accessed 2019-02-09.
  • Stewart, R.H.; J.L. Stewart, and W.P. Woodring. 1980. Geologic Map of the Panama Canal and Vicinity, 1. USGS. Accessed 2019-02-09.

Further reading edit

  • C. Pimiento, G. González-Barba, D. J. Ehret, B. J. MacFadden, A. J. W. Hendy and C. Jaramillo. 2013. Sharks and Rays (Chondrichthyes, Elasmobranchii) from the late Miocene Gatún Formation of Panama. Journal of Paleontology 87(5):755-774

January 01, 1970
gatún, formation, confused, with, gatuncillo, formation, geologic, formation, colón, panamá, provinces, central, panama, formation, crops, around, panama, canal, zone, coastal, marginally, marine, sandstone, siltstone, claystone, tuff, conglomerate, formation,. Not to be confused with Gatuncillo Formation The Gatun Formation Tg 1 is a geologic formation in the Colon and Panama Provinces of central Panama The formation crops out in and around the Panama Canal Zone The coastal to marginally marine sandstone siltstone claystone tuff and conglomerate formation dates to the latest Serravallian to Tortonian Clarendonian to Hemphillian in the NALMA classification from 12 to 8 5 Ma 2 3 It preserves many fossils among others megalodon teeth have been found in the formation Gatun FormationStratigraphic range Latest Serravallian Tortonian Clarendonian Hemphillian 12 8 5 Ma PreꞒ Ꞓ O S D C P T J K Pg N TypeFormationUnderliesalluviumOverliesCaimito Formation unnamed Cretaceous volcanicsLithologyPrimarySandstone siltstoneOtherTuff conglomerateLocationCoordinates9 18 N 79 48 W 9 3 N 79 8 W 9 3 79 8Approximate paleocoordinates8 54 N 78 06 W 8 9 N 78 1 W 8 9 78 1RegionColon ProvinceCountry PanamaExtentPanama BasinType sectionNamed forLake GatunNamed byHoweYear defined1907Gatun Formation Panama Contents 1 Description 2 Fossil content 3 See also 4 References 4 1 Bibliography 5 Further readingDescription editThe Gatun Formation was first defined and named as such by Howe in 1907 The formation was known before and when William Phipps Blake traveled across Panama in 1853 on his way to California to join one of the transcontinental railroad surveying parties he collected a few Gatun Formation fossils 4 In the Canal Zone the contact between the formation with the underlying Caimito Formation is covered by the waters of Lake Gatun and even before the flooding of the lake perhaps all of the contact was concealed by swamps 5 Massive medium to very fine grained sandstones and siltstones are the chief constituents of the Gatun Formation They are somewhat calcareous or marly somewhat tuffaceous and have a clay like matrix The sandstone contains numerous grains of black and greenish volcanic rocks and is practically a subgraywacke Conglomerates and hard brittle very fine grained tuff make up a small part of the formation Basalt intrudes older formations in the Lake Gatun area but is not known to penetrate the Gatun Formation 5 Fossil content editAgatrix agathe 6 Aphera aphrodite 6 Axelella cativa 6 Bivetiella dilatata 6 Cancellaria harzhauseri C mixta 6 Otodus megalodon Carinodrillia zooki Chilomycterus exspectatus C tyleri 7 Conasprella burckhardti C imitator Conus Stephanoconus woodringi 8 Cryoturris habra Cynoscion latiostialis C scitulus 9 Diaphus apalus D gatunensis 10 Euclia alacertata 6 Hindsiclava consors Lepophidium gentilis 11 Leucosyrinx xenica Massyla toulai 6 Pyruclia tweedledee P tweedledum 6 Umbrina opima 9 Ventrilia coatesi 6 See also editList of fossiliferous stratigraphic units in PanamaReferences edit Geologic Map 1980 Aguilera et al 2017 p 5 Gatun Formation at Fossilworks org Woodring 1957 p 42 a b Woodring 1957 p 43 a b c d e f g h i Landau et al 2012 Aguilera et al 2017 Hendricks 2018 a b Aguilera et al 2016 Schwarzhans amp Aguilera 2013 Schwarzhans amp Aguilera 2016 Bibliography edit Aguilera orangel Guilherme Oliveira Andrade Silva Ricardo Tadeu Lopes Alessandra Silveira Machado Thais Maria Dos Santos Gabriela Marques Thayse Bertucci Thayanne Aguiar and Jorge Carrillo Briceno and Felix Rodriguez Carlos Jaramillo 2017 Neogene Proto Caribbean porcupinefishes Diodontidae PLoS ONE 12 7 1 26 Accessed 2019 02 09 Aguilera orangel A Werner Schwarzhans and Philippe Bearez 2016 Otoliths of the Sciaenidae from the Neogene of tropical America Palaeo Ichthyologica 14 7 90 Accessed 2019 02 09 Beu A G 2010 Neogene Tonnoidean Gastropods of Tropical and South America contributions to the Dominican Republic and Panama Paleontology Projects and Uplift of the Central American Isthmus Bulletins of American Paleontology 377 378 1 550 Accessed 2019 02 09 Cadena E J R Bourque A F Rincon J I Bloch C A Jaramillo and B J MacFadden 2012 New turtles Chelonia from the late Eocene through Late Miocene of the Panama Canal Basin Journal of Paleontology 86 539 557 Accessed 2019 02 09 Hendricks Jonathan R 2018 Diversity and preserved shell coloration patterns of Miocene Conidae Neogastropoda from an exposure of the Gatun Formation Colon Province Panama Journal of Paleontology 92 5 804 837 Accessed 2019 02 09 Landau Bernard Richard E Petit and Carlos M Da Silva 2012 New Cancellariidae Mollusca Gastropoda from the Miocene Gatun Formation of Panama with Eleven New Species Journal of Paleontology 86 6 907 930 Accessed 2019 02 09 Schwarzhans Werner and orangel Aguilera 2016 Otoliths of the Ophidiiformes from the Neogene of tropical America Palaeo Ichthyologica 14 91 124 Accessed 2019 02 09 Schwarzhans Werner and orangel Aguilera 2013 Otoliths of the Myctophidae from the Neogene of tropical America Palaeo Ichthyologica 13 83 150 Accessed 2019 02 09 Woodring W P 1957 Geology and Paleontology of Canal Zone and Adjoining Parts of Panama 306A Geology and description of Tertiary mollusks Gastropods Trochidae to Turritellidae 1 186 USGS Accessed 2019 02 09 Stewart R H J L Stewart and W P Woodring 1980 Geologic Map of the Panama Canal and Vicinity 1 USGS Accessed 2019 02 09 Further reading editC Pimiento G Gonzalez Barba D J Ehret B J MacFadden A J W Hendy and C Jaramillo 2013 Sharks and Rays Chondrichthyes Elasmobranchii from the late Miocene Gatun Formation of Panama Journal of Paleontology 87 5 755 774 Retrieved from https en wikipedia org w index php title Gatun Formation amp oldid 1223143512, wikipedia, wiki, book, books, library,

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