Trace fossils on and above the transgressive surface: Substrate consistency and phosphogenesis (Lower Ordovician, St Petersburg region, Russia)

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Trace fossils on and above the transgressive surface: Substrate consistency and phosphogenesis (Lower Ordovician, St Petersburg region, Russia). / Ershova, V.B.; Fedorov, P.V.; Mikulas, Radek.

в: Geologica Carpathica, Том 57, № 5, 2006, стр. 415-422.

Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование

BibTeX

@article{168e1e51e164466fb59bece3c76c7daa,

title = "Trace fossils on and above the transgressive surface: Substrate consistency and phosphogenesis (Lower Ordovician, St Petersburg region, Russia)",

abstract = " The basal layers of the Leetse Formation (Lower Ordovician, St Petersburg region, Russia) are characterizedichnologically by: 1 – local occurrence of the ichnogenera Conichnus, Bergaueria and ?Thalassinoides at the base.These traces originated by burrowing in consolidated substrate of the underlying black, clayey Dictyonema Shale and were buried by the basal bed of the Leetse Formation; 2 – the layer with camerate burrows (Amphorichnus div. isp.), filled with phosphatic substrates, ca 15 cm above the base. Considering the position of the localities of the phosphatized burrows in the basin, we presume that burrows on tops of tectonically uplifted blocks were filled by cryptocrystalline phosphorite matter. Rapid phosphate mineralization points to conditions of shallow burial, high concentration of dissolved pore water phosphate, and suitable redox interval caused by decomposition of organic matter of burrow dweller tissues.",

keywords = "Lower Ordovician,, Russia,, St Petersburg region,, firmgrounds,, platform sediments,, trace fossils,, phosphate.",

author = "V.B. Ershova and P.V. Fedorov and Radek Mikulas",

note = "Ershova V.B., Fedorov P.V., Miculas R. 2006. Trace fossils on and above the transgressive surface: surface consistency and phosphogenesis (Lower Ordovician, St. Petersburg Region, Russia). Geologica Carpathica, vol. 57, No 5, p.415-422.",

year = "2006",

language = "English",

volume = "57",

pages = "415--422",

journal = "Geologica Carpathica",

issn = "1335-0552",

publisher = "Slovak Academic Press Ltd",

number = "5",

}

RIS

TY - JOUR

T1 - Trace fossils on and above the transgressive surface: Substrate consistency and phosphogenesis (Lower Ordovician, St Petersburg region, Russia)

AU - Ershova, V.B.

AU - Fedorov, P.V.

AU - Mikulas, Radek

N1 - Ershova V.B., Fedorov P.V., Miculas R. 2006. Trace fossils on and above the transgressive surface: surface consistency and phosphogenesis (Lower Ordovician, St. Petersburg Region, Russia). Geologica Carpathica, vol. 57, No 5, p.415-422.

PY - 2006

Y1 - 2006

N2 - The basal layers of the Leetse Formation (Lower Ordovician, St Petersburg region, Russia) are characterizedichnologically by: 1 – local occurrence of the ichnogenera Conichnus, Bergaueria and ?Thalassinoides at the base.These traces originated by burrowing in consolidated substrate of the underlying black, clayey Dictyonema Shale and were buried by the basal bed of the Leetse Formation; 2 – the layer with camerate burrows (Amphorichnus div. isp.), filled with phosphatic substrates, ca 15 cm above the base. Considering the position of the localities of the phosphatized burrows in the basin, we presume that burrows on tops of tectonically uplifted blocks were filled by cryptocrystalline phosphorite matter. Rapid phosphate mineralization points to conditions of shallow burial, high concentration of dissolved pore water phosphate, and suitable redox interval caused by decomposition of organic matter of burrow dweller tissues.

AB - The basal layers of the Leetse Formation (Lower Ordovician, St Petersburg region, Russia) are characterizedichnologically by: 1 – local occurrence of the ichnogenera Conichnus, Bergaueria and ?Thalassinoides at the base.These traces originated by burrowing in consolidated substrate of the underlying black, clayey Dictyonema Shale and were buried by the basal bed of the Leetse Formation; 2 – the layer with camerate burrows (Amphorichnus div. isp.), filled with phosphatic substrates, ca 15 cm above the base. Considering the position of the localities of the phosphatized burrows in the basin, we presume that burrows on tops of tectonically uplifted blocks were filled by cryptocrystalline phosphorite matter. Rapid phosphate mineralization points to conditions of shallow burial, high concentration of dissolved pore water phosphate, and suitable redox interval caused by decomposition of organic matter of burrow dweller tissues.

KW - Lower Ordovician,

KW - Russia,

KW - St Petersburg region,

KW - firmgrounds,

KW - platform sediments,

KW - trace fossils,

KW - phosphate.

M3 - Article

VL - 57

SP - 415

EP - 422

JO - Geologica Carpathica

JF - Geologica Carpathica

SN - 1335-0552

IS - 5

ER -

ID: 5313452