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Adze Formation

ID: 371

General info

Unit nameAdze kihistu
Unit nameAdze Formation
Belongs toBaltic lithostratigraphy (Ordovician)
Typelithostratigraphy
RankFormation
Scoperegional
RegionLatvia 1; ns:Latvia 3
Statusformal standard
AuthorUlst et al.
Year1970
EtymonAdze, village (L)
Original locality*Adze-6 core, 888,0-895.5m
AgeKurna Subseries
IndexCIII-DII
IndexO3adz
Remarksns: Saldus-5RM core, 1060,0-1073,0m [6]

Stratotypes

TypeLocalityDepth (m)ReferenceRemarks
holostratotypeAdze 6 borehole888.00..895.00Ulst et al., 1984
neostratotypeSaldus 5PM borehole1060.00..1073.00Brangulis et al., 1989

Chemical composition and other properties

Variableminavgmaxstdcount
Al2O3 [%]1.700002.930004.010000.986205
Ba [ppm]1
CaO [%]38.6900043.1140046.980002.865125
Cl [%]0.020000.092500.160000.049684
CO2 [%]32.2800035.6300038.240002.248844
Cr [ppm]1
delta13C [‰]-0.670000.500261.340000.3934238
delta18O [‰]-6.09000-4.12971-0.100001.2003935
Dry density [kg/m3]2496.000002561.000002605.0000039.471505
Fe2O3 [%]1.720001.720001.720000.000001
Fe2O3total [%]1.120001.598332.040000.365446
FeO [%]0.060000.210000.350000.103345
Grain density [kg/m3]2715.000002724.000002735.000006.899275
Insoluble Residue [%]10.8600018.0200025.160005.055864
K2O [%]0.800001.218001.730000.381015
LOI [%]34.6000034.6000034.600000.000001
MgO [%]1.090001.579992.180000.403885
MnO [%]0.020000.096000.190000.058515
Na2O [%]0.060000.250000.660000.212035
P-wave velocity [m/sec in dry sample]4000.000004195.500004406.00000158.660804
P-wave velocity [m/sec in wet sample]4049.000004296.036004536.00000181.997065
P2O5 [%]0.080000.160000.310000.081245
Porosity [%]4.490006.262008.320001.448065
S [%]0.053000.144600.270000.070375
SiO2 [%]8.2400012.7420017.720003.393835
SUM [%]100.40000100.40000100.400000.000001
TiO2 [%]0.090000.161990.230000.057065
V [ppm]1
Wet density [kg/m3]2579.000002616.000002650.0000029.072325

Specimens in collections (approximately): 49

Samples in collections (approximately): 68

Thickness map (partial data only)

Localitybase, mtop, mthicknessreferencepreferred
Abja 92 borehole 429.60 413.60 16.00 Kajak 1969 1
Alatskivi 422 borehole 214.30 201.00 13.30 Kajak 1974 1
Valga 10 borehole 403.70 390.80 12.90 Põldvere, Anne (koost), 2001 1
Ruhnu 500 borehole 659.70 647.10 12.60 Põldvere, Anne (koost), 2003 1
Viljandi 91 borehole 359.20 347.60 11.60 Kajak 1969 0
Taagepera borehole 481.80 472.50 9.30 Perens, H 1982 1
Häädemeeste 172 borehole 488.60 480.50 8.10 Kajak 1969 1
Elva 555 borehole 348.90 341.10 7.80 Kajak 1971 0
Põlva 423 borehole 376.70 369.40 7.30 Kajak 0