Upper Paleozoic Lithostratigraphy of the Southern Norwegian Barents Sea

• Abstract
• Preface
• Acknowledgement
• Introduction
  • Background
  • Procedure
  • Data presentation
  • Chrono-stratigraphy
  • Geological Setting
• Lithostratigraphy
  • Tempelfjorden Gr.
  • Ørret Fm.
  • Røye Fm.
  • Bjarmeland Gr.
  • Isbjørn Fm.
  • Ulv Fm.
  • Polarrev Fm.
  • Gipsdalen Gr.
  • Ørn Fm.
  • Falk Fm.
  • Ugle Fm.
  • Billefjorden Gr.
  • Blærerot Fm.
  • Tettegras Fm.
  • Soldogg Fm.
• References
• Appendix
• Home

 

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Falk Formation (Falkeformasjonen)

Name

Definition

Reference sections

Thickness

Lithology

Lateral extent and variation

Age

Depositional environments

Correlation

 

Name:

From the Norwegian name for a falcon (4 species, all belonging to the genus Falco, are found in northern Norway).

 

Definition:

The type section is defined in the interval from 2221 m to 2024 m (log depth) in well 7120/2-1 on the Loppa High (Fig. 20; Table 1). The base corresponds to 2225,7 m in core depth (Fig. 24). The formational base reflects an abrupt change from non-marine, reddish brown conglomerates of the Ugle Formation to dark grey, marine shales and marks the first marine transgression in the area; this gives a log response characterised by a change toward overall lower readings on the gamma ray log as a result of the transition into carbonates (Fig. 20). The formation otherwise shows a noisy log pattern, reflecting the intercalation of siliciclastics and carbonates.

 

Fig. 24. Sedimentological log of the cored part of the Falk Formation in the type section in well 7120/2-1. Reproduced from Stemmerik et al. (1998), with permission from Norsk Petroleumsforening. For explanation of symbols see Fig. 3.

 

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Reference sections:

 

Reference sections are found from 2150 m to 2050 m in well 7128/6-1 (Fig. 25), 2058 m to 1952 m in 7128/4-1 (Fig. 26), 498.6 m to 363.5 m in core 7029/03-U-02 (Fig. 27) and fromTD at 481.7 m to 458 m in 7030/03-U-01 (Fig. 28), all located on the Finnmark Platform. In 7029/03-U-02 the base also represents an abrupt change in both colour and overall lithofacies from non-marine, red and green mottled silty shales to marine, greenish-grey, bioturbated silty shales. In wells 7128/4-1 and 7228/6-1 the formation corresponds to unitsL1 and L2 of Ehrenberg et al. (1998a).

 

Fig. 25. Well logs of the reference section of the Falk Formation in 7128/6-1.

For explanation of symbols see Fig. 3.

 

 

Fig. 26. Well logs showing reference section through the Falk Formation in well 7128/4-1 on the Finnmark Platform. For explanation of symbols see Fig. 3.

 

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Thickness:

The formation is thickest in the type well (201.7 m); it is 135 m thick in 7029/03-U-02 on the southern Finnmark Platform and thins northwards to 100 m in well 7128/6-1 and 58 m in 7128/4-1 (Fig. 19). The formation is missing in 7226/11-1 where carbonates of the overlying Г