GEUS Bulletin no 5.pmd

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Upper Jurassic Middle Jurassic tion are controlled by the occurrence and accessibility of these fine-grained beds. In contrast, the shale of the Bernbjerg Formation provides productive samples throughout the formation. Standard palynological preparation has been performed on most samples. A minority of the samples were prepared by the tank-preparation method (Poulsen et al. 1990). Both methods involve treatment with hydrofluoric (HF) and hydrochloric acids (HCl) followed by filtering at 20 µm mesh size, short oxidation by nitric acid (HNO 3 ) and washing in low concentration potassium hydroxide (KOH). Biostratigraphy The ammonites and dinoflagellate cysts have been analysed and correlated to the Boreal ammonite and dinoflagellate stratigraphy, i.e. East Greenland strati- 76 Callovian Oxfordian Kimmeridgian L M U L M U Chronozones Lithology Lithostratigraphy A. mutabilis R. cymodoce P. baylei A. rosenkrantzi A. regulare A. serratum A. glosense C. tenuiserratum C. densiplicatum C. cordatum Q. mariae Q. lamberti P. athleta E. coronatum K. jason S. calloviense P. koenigi C. nordenskjoeldi C. apertum Sandstone Heterolithic sandstone Mudstone Bernbjerg Formation Payer Dal Formation Pelion Formation Ammonite Spath Plateau Member lower sandstone unit Dinoflagellate cyst graphy (Callomon 1993; Milner & Piasecki 1996; Piasecki 1996; Piasecki & Stemmerik 2004, this volume; Piasecki et al. 2004, this volume). Ammonites GEUS Bulletin no 5.pmd 76 29-10-2004, 11:14 Fig. 3. Schematic correlation of the Jurassic succession on northern Hold with Hope. The lithostratigraphical units are correlated with the Middle to Upper Jurassic chronozonation on the basis of ammonites and dinoflagellate cysts. Points of correlation to chronozones are indicated by ammonite or dinoflagellate cyst signatures. The subdivision of the chronozones corresponds to the ammonite faunas in the biozonation. Ammonites are very restricted in the Jurassic succession on Hold with Hope, and only three horizons have been dated and correlated with the standard Boreal ammonite stratigraphy (Callomon 1993). A specimen referred to Cadoceras cf. breve (J.H. Callomon and P. Alsen, personal communications 1997) was found 10 m Facing page: Fig. 4. Simplified sedimentological logs of the Jurassic succession from Localities 1, 2 and 3 on northern Hold with Hope. The formal and informal lithostratigraphic units are indicated together with the ammonite horizons; l.s., lower shale.
Bernbjerg Formation Payer Dal Formation Pelion Formation Spath Plateau Member upper sandstone unit l. s. unit lower sandstone unit C. apertum – P. koenigi K. jason P. athleta C. tenuiserratum A. glosense P. baylei m 350 300 250 200 150 100 50 0 Locality 1 Poor exposure Poor exposure Poor exposure F M C Silt Sand Pebbles A. glosense A. glosense P. koenigi GGU sample no. 427851 427850 427859 427858 427810 427809 427808 427796 427793 427790 427780 427840 427833 427836 427730 427729 427818 427782 427705 427717 427729 Pelion Formation Spath Plateau Member C. apertum – P. koenigi Lithology m 50 0 m 30 0 Siltstone Silty sandstone Sandstone Locality 2 Locality 3 GEUS Bulletin no 5.pmd 77 29-10-2004, 11:14 lower sandstone unit Payer Dal Formation C. tenuiserratum – A. glosense Pebbly sandstone Pebble lag Structures Horizontal lamination Planar bedding Wave ripple Hummocky cross-stratification Cross-lamination Planar cross-bedding Trough cross-bedding Ammonite/Zone F M C Silt Sand Pebbles F M C Silt Sand Pebbles C. apertum GGU sample no. 433859 433159 433158 433157 433858 444857 444856 444855 433869 444832 444830 433868 444854 433865 77
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GEOLOGICAL SURVEY OF DENMARK AND GR
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GEUS Bulletin no 5.pmd 3 29-10-2004
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Contents Preface . . . . . . . . .
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(Alsen & Surlyk 2004, this volume).
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Jurassic syn-rift sedimentation on
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NW SE m 1000 500 0 NW SE m 1000 500
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GEUS Bulletin no 5.pmd 13 29-10-200
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grained than the lower parasequence
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the Pelion Formation. The mudstone-
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The fluviatile Bristol Elv Formatio
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Name. After the river Bristol Elv i
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edded, and display both sheet-like
Page 25 and 26: N S Fig. 5. Coarse-grained sandston
Page 27 and 28: Fig. 7. Lacustrine deposits from th
Page 29 and 30: deposition of peat and coal. Journa
Page 31 and 32: Maximum Middle Jurassic transgressi
Page 33 and 34: 834 N Lycett Bjerg Barrikade Gletsc
Page 35 and 36: SW NE Lycett Bjerg Parnas Member Be
Page 37 and 38: Cadoceras cf. nordenskjoeldi Callom
Page 39 and 40: GEUS Bulletin no 5.pmd 39 29-10-200
Page 41 and 42: 4 C B 1 2 GEUS Bulletin no 5.pmd 41
Page 43 and 44: Fig. 1. Sketch-map of the Jameson L
Page 45 and 46: Table 1. Measurement of dimensions
Page 49 and 50: 1 2 GEUS Bulletin no 5.pmd 49 29-10
Page 51 and 52: A new Middle-Upper Jurassic success
Page 53 and 54: 74º00'N ■■ ■■ ■■ 73º5
Page 55 and 56: System Ma 159.4 154.1 164.4 169.2 1
Page 57 and 58: Sedimentary structures Biota Struct
Page 59 and 60: wards units is biogenic carbonate d
Page 61 and 62: Fig. 7. Log panel giving a broadly
Page 63 and 64: SPM LU to medium-grained and consis
Page 65 and 66: and mudstone drapes reflects varyin
Page 67 and 68: with the presence of a minor angula
Page 69 and 70: the north-east and south-west, resp
Page 71 and 72: elly mass-flow deposits. In: Koster
Page 73 and 74: Jurassic dinoflagellate cyst strati
Page 75: 74°00'N ■■ ■■ ■■ 73°5
Page 79 and 80: Depositional environment. The prese
Page 85 and 86: Metres 30 20 10 Hold with Hope, Loc
Page 87 and 88: Correlations The Pelion Formation o
Page 89 and 90: Jurassic dinoflagellate cysts from
Page 91 and 92: Fig. 2. Sedimentological log of the
Page 93 and 94: LITHOSTRATIGRAPHY BIOSTRATIGRAPHY F
Page 95 and 96: ALPHABETICAL SPECIES LIST 41 Adnato
Page 97 and 98: References Alsgaard, P.C., Felt, V.
Page 99 and 100: Jurassic dinoflagellate cyst strati
Page 101 and 102: parties from the Geological Survey
Page 103 and 104: may indicate a hiatus in the sedime
Page 105 and 106: Metre 50 25 0 Store Koldewey Ravn P
Page 107 and 108: Fig. 6. Schematic stratigraphical c
Page 109 and 110: Chronozone) to the earliest Kimmeri
Page 111 and 112: The Upper Jurassic succession is co
Page 115 and 116: 185 Greenland from Archaean to Quat
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GEUS Bulletin no 5.pmd

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