RICE, A. H. N., HOFMANN, C.-C. (2000) Evidence for a glacial origin of Neoproterozoic III striations at Oaibaččannjar'ga, Finnmark, northern Norway. Geological Magazine, 137 (4) 355-366 doi:10.1017/s0016756800004222
| Reference Type | Journal (article/letter/editorial) | ||
|---|---|---|---|
| Title | Evidence for a glacial origin of Neoproterozoic III striations at Oaibaččannjar'ga, Finnmark, northern Norway | ||
| Journal | Geological Magazine | ||
| Authors | RICE, A. H. N. | Author | |
| HOFMANN, C.-C. | Author | ||
| Year | 2000 (July) | Volume | 137 |
| Issue | 4 | ||
| Publisher | Cambridge University Press (CUP) | ||
| DOI | doi:10.1017/s0016756800004222Search in ResearchGate | ||
| Generate Citation Formats | |||
| Mindat Ref. ID | 258436 | Long-form Identifier | mindat:1:5:258436:6 |
| GUID | 0 | ||
| Full Reference | RICE, A. H. N., HOFMANN, C.-C. (2000) Evidence for a glacial origin of Neoproterozoic III striations at Oaibaččannjar'ga, Finnmark, northern Norway. Geological Magazine, 137 (4) 355-366 doi:10.1017/s0016756800004222 | ||
| Plain Text | RICE, A. H. N., HOFMANN, C.-C. (2000) Evidence for a glacial origin of Neoproterozoic III striations at Oaibaččannjar'ga, Finnmark, northern Norway. Geological Magazine, 137 (4) 355-366 doi:10.1017/s0016756800004222 | ||
| In | (2000, July) Geological Magazine Vol. 137 (4) Cambridge University Press (CUP) | ||
| Abstract/Notes | The origin of the famous late Precambrian striated pavement at Oaibaččannjar'ga (Bigganjargga), northern Norway, remains controversial. Most investigators have accepted a glacial formation, but some prefer a soft-sediment mechanism. However, a newly discovered c. 2.5 mm thick zone of brecciation under rare polished striations indicates a hard substrate during formation and thus a glacial origin for the striations. Other points indicating that the striations formed in a hard substrate are: (1) the striated platform (in the Veidnesbotn Formation) is c. 150 Ma older than the overlying diamictite (Smalfjord Formation); having been buried to c. 2.5 km depth, cementation should have started before Smalfjord times; (2) the marked irregularity of the sub-Smalfjord Formation palaeotopography on Skjåholmen; (3) the presence of rounded Veidnesbotn Formation boulders in the diamictite above the striations. Imprints of clasts appearing to lie across the striations are re-interpreted as relicts of mud-flakes within the Veidnesbotn Formation which were cut across and quarried-out during pavement formation. The origin of the overlying diamictite (tillite vs. debris-flow) is not constrained by the presence of glacial striations and most probably was deposited some time after striation formation. | ||
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