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Riga

FormationRiga
Age:428 - 423 Ma
Silurian
IntervalLlandovery - Wenlock
Lithologymarl/"limestone", marl/lime mudstone, marl, "shale", "limestone", "limestone"/lime mudstone, marl/dolomite
Number of Collections49
Number of Occurrences270

Recorded Sample Locations

LocationRegionStratigraphic Name
Glassia obovata-Skeinidioides lewisii Comm. in Riga FormationMarijampolė County, LithuaniaRiga
Glassia Community in the RigaFarmMarijampolė County, LithuaniaRiga
Wenlock conodontsRaseiniai District Municipality, Kaunas County, LithuaniaRiga
Vilkaviškis-134 coreMarijampolė County, LithuaniaRiga
Geluva-99 boreholeRaseiniai District Municipality, Kaunas County, LithuaniaRiga
Kurtuvenai-161 boreholeŠiauliai County, LithuaniaRiga
Pilviskiai-141 boreholeUtena County, LithuaniaRiga
Sutkai-87 Borehole 856.3 mMarijampolė County, LithuaniaRiga
Varbla boreholeEstoniaRiga
Häädemeeste 172 boreholeEstoniaRiga
Ruhnu 500 boreholeSaare County, EstoniaRiga
Kipi boreholeSaare County, EstoniaRiga
Kriukai boreholeŠiauliai County, LithuaniaRiga

Associated Units

Stratigraphic NameAgeLithologyOccurrence Records
Birstonas428 - 423 Ma
Silurian
wackestone, "limestone", "limestone"/lime mudstone199
Dobele441 - 428 Ma
Silurian
limestone, "shale"17
Dubysa427 - 423 Ma
Silurian
marl, "limestone", "limestone"/marl, marl/"limestone", "limestone"/dolomite96
Dubysa - Sesupe beds427 - 423 Ma
Silurian
limestone/marl, marl/"limestone", "limestone", "limestone"/lime mudstone21
Geluva431 - 423 Ma
Silurian
marl/lime mudstone, "limestone", "limestone"/lime mudstone, "limestone"/marl83
Jaani428 - 426 Ma
Silurian
limestone, marl, claystone/marl119
Jura423 - 419 Ma
Paleozoic
marl/"limestone", "limestone", "limestone"/lime mudstone27
Jürmala439 - 428 Ma
Silurian
limestone, claystone/marl18
Kuldiga446 - 444 Ma
Paleozoic
marl/"limestone", "limestone", marl, "mixed carbonate-siliciclastic"285
Lapes423 - 419 Ma
Paleozoic
limestone8
Minija423 - 419 Ma
Paleozoic
marl/"limestone", "limestone"29
Minija - Silale Beds423 - 419 Ma
Paleozoic
limestone, "limestone"/marl24
Minija - Jura423 - 419 Ma
Paleozoic
marl/"limestone"19
Mituva426 - 423 Ma
Silurian
marl/"limestone", "limestone", "limestone"/lime mudstone19
Neris426 - 423 Ma
Silurian
lime mudstone, packstone, "limestone"21
Nevezis427 - 419 Ma
Paleozoic
limestone/marl, "limestone"27
Õhne439 - 428 Ma
Silurian
limestone86
Õhne-Saarde443 - 436 Ma
Silurian
limestone6
Pagegiai423 - 419 Ma
Paleozoic
marl/"limestone", "limestone", "limestone"/lime mudstone15
Paprieniai428 - 423 Ma
Silurian
marl/lime mudstone, "limestone"97
Riga and Geluva433 - 427 Ma
Silurian
marl/"limestone"31
Rumba439 - 428 Ma
Silurian
limestone, grainstone/marl, "limestone"/grainstone44
Saarde443 - 436 Ma
Silurian
limestone32
Siesartis431 - 427 Ma
Silurian
marl/lime mudstone, marl, marl/dolomite, "limestone"30
Širvinta431 - 427 Ma
Silurian
lime mudstone18
Varbola443 - 436 Ma
Silurian
packstone/"limestone", "limestone"128
Velise439 - 428 Ma
Silurian
dolomite/marl, claystone, "limestone"336
Velise - Jaani439 - 426 Ma
Silurian
limestone2
Ventspils426 - 423 Ma
Silurian
limestone10
Vievis423 - 419 Ma
Paleozoic
limestone, "limestone"/lime mudstone11

Recorded Fossils

Accepted NameHierarchyAge
Calymene sp.
genus
6Animalia : Arthropoda : Trilobita : Phacopida : Calymenidae : Calymene433.4 - 427.4 Ma
Silurian
Craniops sp.
genus
6Animalia : Brachiopoda : Craniata : Craniopsidae : Craniops433.4 - 427.4 Ma
Silurian
Lingulidae
family
5Animalia : Brachiopoda : Lingulata : Lingulida : Lingulidae443.4 - 427.4 Ma
Silurian
Protozeuga sp.
genus
6Animalia : Brachiopoda : Rhynchonellata : Spiriferida : Protozeugidae : Protozeuga433.4 - 430.5 Ma
Silurian
Protozeuga bicarinata
species
7Animalia : Brachiopoda : Rhynchonellata : Athyridida : Dayiidae : Protozeuga : Protozeuga bicarinata443.4 - 427.4 Ma
Silurian
Nucleospira pisum
species
7Animalia : Brachiopoda : Rhynchonellata : Athyridida : Nucleospiridae : Nucleospira : Nucleospira pisum428.2 - 422.9 Ma
Silurian
Atrypa sp.
genus
6Animalia : Brachiopoda : Rhynchonellata : Atrypida : Atrypidae : Atrypa433.4 - 427.4 Ma
Silurian
Atrypa (Gotatrypa) hedei
species
7Animalia : Brachiopoda : Rhynchonellata : Atrypida : Atrypidae : Atrypa : Atrypa (Gotatrypa) hedei433.4 - 430.5 Ma
Silurian
Atrypa reticularis
species
7Animalia : Brachiopoda : Rhynchonellata : Atrypida : Atrypidae : Atrypa : Atrypa reticularis433.4 - 427.4 Ma
Silurian
Atrypina barrandii
species
7Animalia : Brachiopoda : Rhynchonellata : Atrypida : Atrypinidae : Atrypina : Atrypina barrandii428.2 - 422.9 Ma
Silurian
Glassia sp.
genus
6Animalia : Brachiopoda : Rhynchonellata : Atrypida : Glassiidae : Glassia433.4 - 427.4 Ma
Silurian
Cromatrypa pubes
species
7Animalia : Brachiopoda : Rhynchonellata : Atrypida : Lissatrypidae : Cromatrypa : Cromatrypa pubes428.2 - 422.9 Ma
Silurian
Lissatrypa lithuanica
species
7Animalia : Brachiopoda : Rhynchonellata : Atrypida : Lissatrypidae : Lissatrypa : Lissatrypa lithuanica428.2 - 422.9 Ma
Silurian
Lissatrypa obovata
species
7Animalia : Brachiopoda : Rhynchonellata : Atrypida : Lissatrypidae : Lissatrypa : Lissatrypa obovata443.4 - 427.4 Ma
Silurian
Septatrypa subaequalis
species
7Animalia : Brachiopoda : Rhynchonellata : Atrypida : Septatrypidae : Septatrypa : Septatrypa subaequalis428.2 - 422.9 Ma
Silurian
Isorthis sp.
genus
6Animalia : Brachiopoda : Rhynchonellata : Orthida : Dalmanellidae : Isorthis443.4 - 427.4 Ma
Silurian
Onniella pashkevichiusi
species
7Animalia : Brachiopoda : Rhynchonellata : Orthida : Dalmanellidae : Onniella : Onniella pashkevichiusi443.4 - 427.4 Ma
Silurian
Ravozetina sp.
genus
6Animalia : Brachiopoda : Rhynchonellata : Orthida : Dalmanellidae : Ravozetina443.4 - 427.4 Ma
Silurian
Resserella sp.
genus
6Animalia : Brachiopoda : Rhynchonellata : Orthida : Dalmanellidae : Resserella433.4 - 430.5 Ma
Silurian
Resserella canalis
species
7Animalia : Brachiopoda : Rhynchonellata : Orthida : Dalmanellidae : Resserella : Resserella canalis433.4 - 427.4 Ma
Silurian
Visbyella visbyensis
species
7Animalia : Brachiopoda : Rhynchonellata : Orthida : Dalmanellidae : Visbyella : Visbyella visbyensis433.4 - 430.5 Ma
Silurian
Dicoelosia biloba
species
7Animalia : Brachiopoda : Rhynchonellata : Orthida : Dicoelosiidae : Dicoelosia : Dicoelosia biloba433.4 - 430.5 Ma
Silurian
Dicoelosia paralata
species
7Animalia : Brachiopoda : Rhynchonellata : Orthida : Dicoelosiidae : Dicoelosia : Dicoelosia paralata433.4 - 430.5 Ma
Silurian
Glyptorthis sp.
genus
6Animalia : Brachiopoda : Rhynchonellata : Orthida : Glyptorthidae : Glyptorthis433.4 - 430.5 Ma
Silurian
Dolerorthis sp.
genus
6Animalia : Brachiopoda : Rhynchonellata : Orthida : Hesperorthidae : Dolerorthis433.4 - 430.5 Ma
Silurian
Dalejina hybrida
species
7Animalia : Brachiopoda : Rhynchonellata : Orthida : Rhipidomellidae : Dalejina : Dalejina hybrida433.4 - 427.4 Ma
Silurian
Mendacella sp.
genus
6Animalia : Brachiopoda : Rhynchonellata : Orthida : Rhipidomellidae : Mendacella433.4 - 430.5 Ma
Silurian
Clorinda sp.
genus
6Animalia : Brachiopoda : Rhynchonellata : Pentamerida : Clorindidae : Clorinda433.4 - 427.4 Ma
Silurian
Gypidula galeata
species
7Animalia : Brachiopoda : Rhynchonellata : Pentamerida : Gypidulidae : Gypidula : Gypidula galeata443.4 - 427.4 Ma
Silurian
Skenidioides lewisii
species
7Animalia : Brachiopoda : Rhynchonellata : Protorthida : Skenidiidae : Skenidioides : Skenidioides lewisii443.4 - 427.4 Ma
Silurian
Skenidioides petrasi
species
7Animalia : Brachiopoda : Rhynchonellata : Protorthida : Skenidiidae : Skenidioides : Skenidioides petrasi428.2 - 426.2 Ma
Silurian
Plagiorhyncha sp.
genus
6Animalia : Brachiopoda : Rhynchonellata : Rhynchonellida : Camarotoechiidae : Plagiorhyncha443.4 - 427.4 Ma
Silurian
Plagiorhyncha depressa
species
7Animalia : Brachiopoda : Rhynchonellata : Rhynchonellida : Camarotoechiidae : Plagiorhyncha : Plagiorhyncha depressa428.2 - 422.9 Ma
Silurian
Stegerhynchus sp.
genus
6Animalia : Brachiopoda : Rhynchonellata : Rhynchonellida : Rhynchotrematidae : Stegerhynchus443.4 - 427.4 Ma
Silurian
Cyrtia sp.
genus
6Animalia : Brachiopoda : Rhynchonellata : Spiriferinida : Syringothyrididae : Cyrtia443.4 - 427.4 Ma
Silurian
Cyrtia exporrectus
species
7Animalia : Brachiopoda : Rhynchonellata : Spiriferida : Cyrtiidae : Cyrtia : Cyrtia exporrectus443.4 - 427.4 Ma
Silurian
Eospirifer radiatus
species
7Animalia : Brachiopoda : Rhynchonellata : Spiriferida : Cyrtiidae : Eospirifer : Eospirifer radiatus433.4 - 430.5 Ma
Silurian
Howellella sp.
genus
6Animalia : Brachiopoda : Rhynchonellata : Spiriferida : Delthyrididae : Howellella433.4 - 427.4 Ma
Silurian
Howellella elegans
species
7Animalia : Brachiopoda : Rhynchonellata : Spiriferida : Delthyrididae : Howellella : Howellella elegans433.4 - 430.5 Ma
Silurian
Fardenia (Coolinia) sp.
subgenus
6.3Animalia : Brachiopoda : Strophomenata : Orthotetida : Chilidiopsidae : Fardenia (Coolinia)433.4 - 430.5 Ma
Silurian
Protochonetes minimus
species
7Animalia : Brachiopoda : Strophomenata : Productida : Strophochonetidae : Protochonetes : Protochonetes minimus433.4 - 430.5 Ma
Silurian
Jonesea grayi
species
7Animalia : Brachiopoda : Strophomenata : Strophomenida : Sowerbyellidae : Jonesea : Jonesea grayi443.4 - 427.4 Ma
Silurian
Mesopholidostrophia laevigata
species
7Animalia : Brachiopoda : Strophomenata : Strophomenida : Eopholidostrophiidae : Mesopholidostrophia : Mesopholidostrophia laevigata433.4 - 430.5 Ma
Silurian
Leangella sp.
genus
6Animalia : Brachiopoda : Strophomenata : Strophomenida : Leptestiidae : Leangella443.4 - 427.4 Ma
Silurian
Leangella (Leangella) segmentum
species
7Animalia : Brachiopoda : Strophomenata : Strophomenida : Leptestiidae : Leangella : Leangella (Leangella) segmentum443.4 - 427.4 Ma
Silurian
Mesoleptostrophia filosa
species
7Animalia : Brachiopoda : Strophomenata : Strophomenida : Leptostrophiidae : Mesoleptostrophia : Mesoleptostrophia filosa433.4 - 430.5 Ma
Silurian
Leptaena (Leptaena) altera
species
7Animalia : Brachiopoda : Strophomenata : Strophomenida : Rafinesquinidae : Leptaena : Leptaena (Leptaena) altera433.4 - 430.5 Ma
Silurian
Leptaena (Leptaena) depressa
species
7Animalia : Brachiopoda : Strophomenata : Strophomenida : Rafinesquinidae : Leptaena : Leptaena (Leptaena) depressa433.4 - 430.5 Ma
Silurian
Leptaena holcrofti
species
7Animalia : Brachiopoda : Strophomenata : Strophomenida : Rafinesquinidae : Leptaena : Leptaena holcrofti443.4 - 427.4 Ma
Silurian
Eoplectodonta sp.
genus
6Animalia : Brachiopoda : Strophomenata : Strophomenida : Sowerbyellidae : Eoplectodonta433.4 - 427.4 Ma
Silurian
Eoplectodonta (Eoplectodonta) duvalii
species
7Animalia : Brachiopoda : Strophomenata : Strophomenida : Sowerbyellidae : Eoplectodonta : Eoplectodonta (Eoplectodonta) duvalii430.5 - 427.4 Ma
Silurian
Eoplectodonta (Eoplectodonta) penkillensis
species
7Animalia : Brachiopoda : Strophomenata : Strophomenida : Sowerbyellidae : Eoplectodonta : Eoplectodonta (Eoplectodonta) penkillensis433.4 - 430.5 Ma
Silurian
Eoplectodonta (Ygerodiscus) sp.
subgenus
6.3Animalia : Brachiopoda : Strophomenata : Strophomenida : Sowerbyellidae : Eoplectodonta (Ygerodiscus)443.4 - 427.4 Ma
Silurian
Eoplectodonta (Ygerodiscus) bella
species
7Animalia : Brachiopoda : Strophomenata : Strophomenida : Sowerbyellidae : Eoplectodonta : Eoplectodonta (Ygerodiscus) bella433.4 - 430.5 Ma
Silurian
Eoplectodonta (Ygerodiscus) cornuta
species
7Animalia : Brachiopoda : Strophomenata : Strophomenida : Sowerbyellidae : Eoplectodonta : Eoplectodonta (Ygerodiscus) cornuta430.5 - 427.4 Ma
Silurian
Eoplectodonta duvalii
species
7Animalia : Brachiopoda : Strophomenata : Strophomenida : Sowerbyellidae : Eoplectodonta : Eoplectodonta duvalii443.4 - 427.4 Ma
Silurian
Acodus curvatus
species
7Animalia : Chordata : Belodellidae : Walliserodus : Acodus curvatus430.5 - 427.4 Ma
Silurian
Dapsilodus hamari
species
7Animalia : Chordata : Conodonta : Belodellida : Dapsilodontidae : Dapsilodus : Dapsilodus hamari430.5 - 427.4 Ma
Silurian
Distacodus obliquicostatus
species
7Animalia : Chordata : Dapsilodontidae : Dapsilodus : Distacodus obliquicostatus430.5 - 427.4 Ma
Silurian
Oulodus sp.
genus
6Animalia : Chordata : Conodonta : Oulodus430.5 - 427.4 Ma
Silurian
Decoriconus fragilis
species
7Animalia : Chordata : Conodonta : Strachanognathidae : Decoriconus : Decoriconus fragilis430.5 - 427.4 Ma
Silurian
Oneotodus beckmanni
species
7Animalia : Chordata : Strachanognathidae : Pseudooneotodus : Oneotodus beckmanni430.5 - 427.4 Ma
Silurian
Pseudooneotodus bicornis
species
7Animalia : Chordata : Strachanognathidae : Pseudooneotodus : Pseudooneotodus bicornis430.5 - 427.4 Ma
Silurian
Pseudooneotodus coniformis
species
7Animalia : Chordata : Strachanognathidae : Pseudooneotodus : Pseudooneotodus coniformis430.5 - 427.4 Ma
Silurian
Ctenognathodus murchisoni
species
7Animalia : Chordata : Kockelellidae : Ctenognathodus : Ctenognathodus murchisoni430.5 - 427.4 Ma
Silurian
Kockelella ortus
species
7Animalia : Chordata : Conodonta : Ozarkodinida : Kockelellidae : Kockelella : Kockelella ortus430.5 - 427.4 Ma
Silurian
Ozarkodina excavata
species
7Animalia : Chordata : Spathognathodontidae : Wurmiella : Ozarkodina excavata430.5 - 427.4 Ma
Silurian
Paltodus equicostatus
species
7Animalia : Chordata : Distacodontidae : Panderodus : Paltodus equicostatus430.5 - 427.4 Ma
Silurian
Paltodus panderi
species
7Animalia : Chordata : Distacodontidae : Panderodus : Paltodus panderi430.5 - 427.4 Ma
Silurian
Panderodus unicostatus
species
7Animalia : Chordata : Distacodontidae : Panderodus : Panderodus unicostatus430.5 - 427.4 Ma
Silurian
Monograptus sp.
genus
6Animalia : Hemichordata : Pterobranchia : Monograptidae : Monograptus433.4 - 427.4 Ma
Silurian
Cephalopoda
class
3Animalia : Mollusca : Cephalopoda433.4 - 427.4 Ma
Silurian

References

Brazauskas A., Musteikis P. (1991) Brachiopod and Conodont Distribution at the Wenlock - Ludlow boundary of Lithuania, Proceedings of the Estonian Academy of Sciences 40 2, 61-68
Musteikis P. (1993) Silurian Brachiopod communities in the section of the Pilviškiai - 141 borehole, Geologija 14, 118-130
Musteikis P., Paskevicius J. J. (1999) Brachiopod communities of the Lithuanian Silurian, Paleocommunities--a case study from the Silurian and Lower Devonian, 305-326
Musteikis P., Modzalevskaya T. L. (2002) Some Silurian Brachiopods from Lithuania and their Palaeobiogeographical significance, Palaeontology 45 3, 595-626
Musteikis P., Cocks L. R. M. (2004) Strophomenide and orthotetide Silurian brachiopods from the Baltic region, with particular reference to Lithuanian boreholes, Acta Palaeontologica Polonica 49 3, 455-482
Rubel M. (2011) Silurian brachiopods Dictyonellida, Strophomenida, Productida, Orthotetida, Protorthida and Orthida from Estonia, Fossilia Baltica 4, 1-65
Radzevicius S., Spiridonov A., et al (2014) Integrated middle–upper Homerian (Silurian) stratigraphy of the Vidukle-61 well, Lithuania, Gff 136 1, 218-222 doi:10.1080/11035897.2013.866976
Radzeviius S., Spiridonov A., et al (2016) Integrated stratigraphy, conodont turnover and palaeoenvironments of the upper Wenlock and Ludlow in the shallow marine succession of the Vilkaviškis-134 core (Lithuania), Newsletters on Stratigraphy 49 2, 321-336 doi:10.1127/nos/2016/0074
Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!
 
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