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Baldone Formation

ID: 374

General info

Unit nameBaldone kihistu
Unit nameBaldone Formation
Belongs toBaltic lithostratigraphy (Ordovician)
Typelithostratigraphy
RankFormation
Scoperegional
RegionLatvia 4
Statusformal standard
AuthorGailite
Year1975
EtymonBaldone, holiday resort (L)
Original localityBaldone-80 core, 897,0-913,5m
AgeKunda Stage
IndexO2bl

Stratotypes

TypeLocalityDepth (m)ReferenceRemarks
holostratotypeBaldone 80 borehole897.00..913.50Brangulis et al., 1989

Chemical composition and other properties

Variableminavgmaxstdcount
Al2O3 [%]0.720002.507494.800001.1185212
Ba [ppm]0.007000.011990.018000.004108
CaO [%]14.1300025.7242149.600008.1609219
Cl [%]0.010000.022500.050000.016394
CO2 [%]8.1000016.5799939.6600013.342114
Cr [ppm]8
delta13C [‰]0.410000.815261.240000.2212719
delta18O [‰]-6.33000-5.21421-4.410000.6015119
Dry density [kg/m3]2497.000002590.400002673.0000061.6769010
Fe2O3 [%]0.610001.487493.060000.951244
Fe2O3T [%]3.540004.002854.400000.300557
Fe2O3total [%]0.720001.855553.470000.818459
FeO [%]0.070000.575381.010000.2820113
Grain density [kg/m3]2673.000002785.300002888.0000085.1669510
Insoluble Residue [%]7.2000013.0044421.520004.264619
K2O [%]0.360000.861661.810000.4088512
LOI [%]35.4000038.9125040.800001.778648
MgO [%]0.6300012.6426317.500006.4209019
MnO [%]0.120000.198750.260000.0530512
Na2O [%]0.020000.132850.650000.2121812
P-wave velocity [m/sec in dry sample]3397.000003777.250004483.00000419.144594
P-wave velocity [m/sec in wet sample]4114.490004493.898004925.00000356.796645
P2O5 [%]0.025000.245830.760000.2604212
Porosity [%]1.300006.9279912.820004.5362910
S [%]0.020000.267000.680000.233705
SiO2 [%]5.5700023.8491670.9800025.7699312
SUM [%]99.9000099.98750100.300000.126868
TiO2 [%]0.100000.193330.340000.0726112
V [ppm]8
Wet density [kg/m3]2625.000002657.900002712.0000031.4052510

Specimens in collections (approximately): 48

Samples in collections (approximately): 47

Thickness map (partial data only)

Localitybase, mtop, mthicknessreferencepreferred
Taagepera borehole 547.00 518.60 28.40 Perens, H 1982 1
Võru (Reedo) borehole 464.70 448.90 15.80 Vingisaar 0
Abja 92 borehole 473.80 465.30 8.50 Kajak 1969 1
Mehikoorma 421 borehole 360.00 352.00 8.00 Põlma, 1982 Põlma 1982 1
Ruhnu 500 borehole 697.50 690.00 7.50 Põldvere, Anne (koost), 2003 1