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Fjäcka Formation

ID: 386

General info

Unit nameFjäcka kihistu
Unit nameFjäcka Formation
Belongs toBaltic lithostratigraphy (Ordovician)
Typelithostratigraphy
RankFormation
Scoperegional
RegionSweden
Statusformal standard
AuthorJaanusson
Year1963
AgeVormsi Stage
IndexFIbF
IndexO3fj

Chemical composition and other properties

Variableminavgmaxstdcount
Al2O3 [%]5.020005.019995.020000.000001
CaO [%]32.8400032.8400032.840000.000001
carbonates [%]2.3000011.6874931.000008.646738
Cl [%]0.250000.250000.250000.000001
CO2 Amp572.00000970.428571413.00000295.423597
CO2 [%]31.4600031.4600031.460000.000001
delta13C [‰]-0.150000.305991.360000.555575
delta13Corg [‰]-31.10000-30.67142-30.100000.319437
delta15N [‰]-0.400000.275003.600001.275498
delta18O [‰]-5.94000-5.11333-3.510001.133913
Dry density [kg/m3]2493.000002493.000002493.000000.000001
Fe2O3total [%]2.970002.970002.970000.000001
FeO [%]0.310000.310000.310000.000001
Grain density [kg/m3]2739.000002739.000002739.000000.000001
Insoluble Residue [%]25.8400025.8400025.840000.000001
K2O [%]1.820001.819991.820000.000001
LOI_450C [%]7.3000010.8500015.000002.548696
MgO [%]4.180004.180004.180000.000001
MnO [%]0.300000.300000.300000.000001
N [%]0.020000.193740.340000.093668
N2 Amp126.00000715.375001207.00000318.622008
Na2O [%]0.300000.300000.300000.000001
P-wave velocity [m/sec in dry sample]3704.000003704.000003704.000000.000001
P-wave velocity [m/sec in wet sample]3480.000003480.000003480.000000.000001
P2O5 [%]0.030000.030000.030000.000001
Porosity [%]8.990008.990008.990000.000001
S [%]0.200000.200000.200000.000001
SiO2 [%]19.5800019.5799919.580000.000001
TiO2 [%]0.270000.270000.270000.000001
weight [mg]1.690007.0789320.168005.1191215
Wet density [kg/m3]2583.000002583.000002583.000000.000001

Specimens in collections (approximately): 49

Samples in collections (approximately): 40

Thickness map (partial data only)

Localitybase, mtop, mthicknessreferencepreferred
Priekule 20 borehole 1404.20 1401.00 3.20 Põlma, päevik 19 0
Taagepera borehole 451.30 448.60 2.70 Perens, H 1982 1
Tartu 453 borehole 282.60 280.00 2.60 Põldvere, Anne et al., 1998 1
Elva 555 borehole 309.00 306.40 2.60 Kajak 1971 0
Valga 10 borehole 365.70 363.40 2.30 Põldvere, Anne (koost), 2001 1
Abja 92 borehole 392.90 390.90 2.00 Kajak 1969 1
Kaagvere 1 borehole 246.30 244.50 1.80 Meidla, 1996a 1
Häädemeeste 172 borehole 450.80 449.10 1.70 Kajak 1969 1
Ruhnu 500 borehole 631.80 631.10 0.70 Põldvere, Anne (koost), 2003 1