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Blīdene Formation

ID: 378

General info

Unit nameBlīdene kihistu
Unit nameBlīdene Formation
Belongs toBaltic lithostratigraphy (Ordovician)
Typelithostratigraphy
RankFormation
Scoperegional
RegionLatvia 3 ns: same
Statusformal standard
AuthorMännil
Year1963
EtymonBlīdene, set (L)
Original locality*Blidene-5 core, 892,0-895,0m
AgeKeila Stage
IndexO3bl
Remarksns: Saldus-5RM core, 1061,0-1063,0m [6]

Stratotypes

TypeLocalityDepth (m)ReferenceRemarks
holostratotypeBlidene 5 borehole892.00..895.00Brangulis et al., 1989
neostratotypeSaldus 5PM borehole1061.00..1063.00Brangulis et al., 1989

Chemical composition and other properties

Variableminavgmaxstdcount
carbonates [%]9.8000014.6333318.300003.566823
delta13C [‰]0.790001.226991.700000.2544010
delta15N [‰]3.800004.700005.300000.648073
delta18O [‰]-5.60000-4.57250-3.650000.660268
N [%]0.040000.046660.060000.009423
N2 Amp209.00000248.33333277.0000028.767263
weight [mg]9.9910016.7403320.142004.772553

Specimens in collections (approximately): 111

Samples in collections (approximately): 82

Thickness map (partial data only)

Localitybase, mtop, mthicknessreferencepreferred
Abja 92 borehole 413.60 398.70 14.90 Kajak 1969 1
Võhma borehole, Viljandi County 235.55 222.45 13.10 Põlma 0
Häädemeeste 172 borehole 480.50 469.30 11.20 Kajak 1969 1
Taagepera borehole 472.50 464.00 8.50 Perens, H 1982 1
Elva 555 borehole 341.10 334.00 7.10 Kajak 1971 0
Põlva 423 borehole 369.40 364.70 4.70 Kajak 0
Valga 10 borehole 390.80 387.00 3.80 Põldvere, Anne (koost), 2001 1
Aispute 41 borehole 1048.00 1046.00 2.00 Lääts, 2006 1
Ruhnu 500 borehole 647.10 645.70 1.40 Põldvere, Anne (koost), 2003 1