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Journal Article

RECONSTRUCTING A LOST WORLD: EDIACARAN RANGEOMORPHS FROM SPANIARD'S BAY, NEWFOUNDLAND Available to Purchase

GUY M. NARBONNE, MARC LAFLAMME, CAROLYN GREENTREE, PETER TRUSLER
Published: 01 July 2009
Journal of Paleontology (2009) 83 (4): 503–523.
DOI: https://doi.org/10.1666/08-072R1.1
...GUY M. NARBONNE; MARC LAFLAMME; CAROLYN GREENTREE; PETER TRUSLER Abstract Ediacaran fronds at Spaniard's Bay on the Avalon Peninsula of Newfoundland exhibit exquisite, three-dimensional preservation with morphological features less than 0.05 mm in width visible on the best preserved specimens. Most...
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Figure 1. Geographic and stratigraphic distribution of Spaniard's Bay fronds in the Avalon Peninsula of Newfoundland. 1, location of the Spaniard's Bay fossil surface (indicated with a star); 2, stratigraphic level of the Spaniard's Bay fossil surface (indicated with a star) and stratigraphic distribution of Spaniard's Bay taxa at Spaniard's Bay (black bars), Mistaken Point (white bars), and elsewhere in Newfoundland (gray bars, from Hofmann et al., 2008).

Figure 1. Geographic and stratigraphic distribution of Spaniard's Bay frond... Available to Purchase

Published: 01 July 2009
Figure 1. Geographic and stratigraphic distribution of Spaniard's Bay fronds in the Avalon Peninsula of Newfoundland. 1 , location of the Spaniard's Bay fossil surface (indicated with a star); 2 , stratigraphic level of the Spaniard's Bay fossil surface (indicated with a star) and stratigraphic
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Figure 3. Avalofractus abaculus n. gen. et sp. from Spaniard's Bay. Scale bar represents 1 cm. 1, 2, specimen (1) and latex mold (2) of a small, nearly perfectly preserved specimen of Avalofractus abaculus showing partly folded primary and secondary branches, some of which have been partially rotated, and a hollow, cylindrical stem. Note the bending of cleavage around the margin of the fossil on the right-hand side of the latex mold (broken off on the rock specimen). NFM F-754; 3, 6, specimen (3) and latex mold (6) of two specimens of Avalofractus abaculus overlying a small frond referable to Beothukis mistakensis. Uncollectible field specimen; 4, 5, specimen (4) and enlargement of the petalodium in latex (5) of the holotype of Avalofractus abaculus. NFM F-756.

Figure 3. Avalofractus abaculus n. gen. et sp. from Spaniard's Bay. Scale... Available to Purchase

Published: 01 July 2009
Figure 3. Avalofractus abaculus n. gen. et sp. from Spaniard's Bay. Scale bar represents 1 cm. 1 , 2 , specimen ( 1 ) and latex mold ( 2 ) of a small, nearly perfectly preserved specimen of Avalofractus abaculus showing partly folded primary and secondary branches, some of which have been
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Figure 7. Reconstruction of Beothukis mistakensis at Spaniard's Bay.

Figure 7. Reconstruction of Beothukis mistakensis at Spaniard's Bay. Available to Purchase

Published: 01 July 2009
Figure 7. Reconstruction of Beothukis mistakensis at Spaniard's Bay.
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Figure 11. Charnia cf. C. masoni Ford from Spaniard's Bay. Scale bar represents 1 cm. 1, field photograph of an uncollectible specimen; 2, latex mold; 3, interpretive sketch.

Figure 11. Charnia cf. C. masoni Ford from Spaniard's Bay. Scale bar re... Available to Purchase

Published: 01 July 2009
Figure 11. Charnia cf. C. masoni Ford from Spaniard's Bay. Scale bar represents 1 cm. 1 , field photograph of an uncollectible specimen; 2 , latex mold; 3 , interpretive sketch.
Journal Article

Paleoenvironmental analysis of Ediacaran strata in the Catalina Dome, Bonavista Peninsula, Newfoundland Available to Purchase

Sara J. Mason, Guy M. Narbonne, Robert W. Dalrymple, Sean J. O’Brien
Published: 29 January 2013
Canadian Journal of Earth Sciences (2013) 50 (2): 197–212.
DOI: https://doi.org/10.1139/cjes-2012-0099
... outcrops near Mistaken Point in southern Avalon Peninsula and Spaniard’s Bay in northern Avalon. In all of these areas, strata consist of turbidites deposited in deep-water basin-plain and slope environments, but important differences help to constrain interpretations of basin history and Ediacaran...
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Detailed stratigraphic logs of measured sections showing lithic correlations in the Bay Roberts – Green Head – Spaniard’s Bay area (see Fig. 1 for section locations). The beds and intervals used for local correlations were: (1) a distinctive 5–20 cm thick ash bed in the Bay Roberts south and Spaniard’s Bay south sections; (2) a thick package of medium-bedded TCDE turbidites containing numerous ash layers, anomalously thick (5–15 cm) beds of laminated siltstone (F4) and distinctive Mistaken Point-type fossils (cf. Narbonne et al. 2001) that are present in the Bay Roberts south, Green Head, and Spaniard’s Bay sections; (3) the vertical transition between greenish, medium-bedded turbidites and red mudstones of the facies association (FA3) in sections in the Bay Roberts south area; (4) the transition from the red mudstones of FA3 into the grey to green, thin-bedded TDE turbidites of FA4 for correlations between the Bay Roberts south and Spaniard’s Bay sections; and (5) the upward appearance of dark mudstone, the associated gradual vertical increase of large-scale slumps, and the decrease in the abundance of volcanic ash layers (i.e., the FA4–FA5 transition) for correlations between the Bay Roberts south and Spaniard’s Bay sections. Grain-size scale: C., coarse; M., medium; F., fine; V.f., very fine.

Detailed stratigraphic logs of measured sections showing lithic correlation... Available to Purchase

Published: 02 March 2007
Fig. 5. Detailed stratigraphic logs of measured sections showing lithic correlations in the Bay Roberts – Green Head – Spaniard’s Bay area (see Fig.  1 for section locations). The beds and intervals used for local correlations were: (1) a distinctive 5–20 cm thick ash bed in the Bay Roberts
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Outcrop photos and paleocurrent data from two occurrences of oriented frondose fossils. (A) Two felled Charniodiscus specimens lying parallel to each other showing basal attachment disc (holdfast) and ovate frond with stem and prominent terminal spine. The oval nature of the originally circular attachment disc reflects tectonic shortening. (B) Charniodiscus felling orientations from fossil surface 15 (lower Mistaken Point Formation) located 2 km west of Bishop’s Cove, Spaniard’s Bay north (Spaniard’s Bay north stratigraphic section, level 80 m; Fig. 5). In rose diagrams, grey bars show frond orientations and black bars show turbidity-current flow directions from TC intervals. (C)–(E) Rangeomorph fronds. Scale bars = 1 cm. (F) Rangeomorph orientations from fossil surface 52 (Trepassey Formation) located 200 m west of Big Island, Spaniard’s Bay north (Spaniard’s Bay north stratigraphic section, level 408 m; Fig. 5).

Outcrop photos and paleocurrent data from two occurrences of oriented frond... Available to Purchase

Published: 02 March 2007
circular attachment disc reflects tectonic shortening. (B)  Charniodiscus felling orientations from fossil surface 15 (lower Mistaken Point Formation) located 2 km west of Bishop’s Cove, Spaniard’s Bay north (Spaniard’s Bay north stratigraphic section, level 80 m; Fig.  5 ). In rose diagrams, grey bars
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Comparison of the morphometric distribution of Mistaken Point small, stemmed fronds with the small fronds described by Narbonne et al. (2009) in the Spaniard’s Bay area. Distribution of Mistaken Point taxa on the chart is represented by empty ellipses; distribution of Spaniard’s Bay taxa is represented by patterned ellipses. Mistaken Point taxa show significantly more overlap, meaning that the overall body shape of the fronds shows convergence across multiple frond architectures.

Comparison of the morphometric distribution of Mistaken Point small, stemme... Available to Purchase

Published: 01 March 2016
Figure 7 Comparison of the morphometric distribution of Mistaken Point small, stemmed fronds with the small fronds described by Narbonne et al. ( 2009 ) in the Spaniard’s Bay area. Distribution of Mistaken Point taxa on the chart is represented by empty ellipses; distribution of Spaniard’s Bay
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Examples of unipolar rangeomorphs from Newfoundland, Canada. All have been previously described as Beothukis or Culmofrons. All are retrodeformed cast photographs. A) Specimen from MUN Surface, Bonavista Peninsula (MUN-3). B) Specimen from E Surface, Mistaken Point (MP-5). C) Specimen from Lower Mistaken Point, Mistaken Point (LMP-3). D) Specimen from Spaniard's Bay (SB-5). E) Specimen from E Surface (Queen's), Mistaken Point (MP-8). F, H) Specimens from Spaniard's Bay (SB-1, SB-2 respectively). G) Specimen from Bonavista Peninsula (B-1). Scale bars = 1 cm.

Examples of unipolar rangeomorphs from Newfoundland, Canada. All have been ... Available to Purchase

Published: 22 December 2020
) Specimen from Lower Mistaken Point, Mistaken Point (LMP-3). D ) Specimen from Spaniard's Bay (SB-5). E ) Specimen from E Surface (Queen's), Mistaken Point (MP-8). F , H ) Specimens from Spaniard's Bay (SB-1, SB-2 respectively). G ) Specimen from Bonavista Peninsula (B-1). Scale bars = 1 cm.
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(a) Holotype of Beothukis mistakensis from the ‘E Surface’ within the Mistaken Point Ecological Reserve. Scale bar, 5 cm. (b) Specimen previously attributed to Beothukis mistakensis from Spaniard’s Bay, showing that the inferred pedal disc and stalk are actually related to obstacle scour and lie within a flute mark. bp – primary branch; cos – crescentic obstacle scour; fl – erosion within flute; pd – pedal holdfast; st – stalk. The current was from left to right. Scale bar, 2 cm. (c) Specimen previously attributed to Beothukis mistakensis from Spaniard’s Bay showing a conical erosion on the up-current end of a shallow flute. fl – flute. The current was from left to right. Scale bar, 2 cm. (d) Holotype of Culmofrons plumosa from Lower Mistaken Point within the Mistaken Point Ecological Reserve. Scale bar, 3 cm.

(a) Holotype of Beothukis mistakensis from the ‘E Surface’ within the Mis... Available to Purchase

Published: 24 September 2020
Fig. 2. (a) Holotype of Beothukis mistakensis from the ‘E Surface’ within the Mistaken Point Ecological Reserve. Scale bar, 5 cm. (b) Specimen previously attributed to Beothukis mistakensis from Spaniard’s Bay, showing that the inferred pedal disc and stalk are actually related to obstacle
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Avalon and Bonavista peninsulas, southeastern Newfoundland, highlighting fossiliferous Ediacaran localities at Mistaken Point, Spaniard’s Bay and the Catalina Dome.

Avalon and Bonavista peninsulas, southeastern Newfoundland, highlighting fo... Available to Purchase

Published: 24 September 2020
Fig. 1. Avalon and Bonavista peninsulas, southeastern Newfoundland, highlighting fossiliferous Ediacaran localities at Mistaken Point, Spaniard’s Bay and the Catalina Dome.
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Comparison of stem length versus total specimen length among specimens of Beothukis mistakensis (n = 10), Culmofrons plumosa (n = 13) and undetermined Beothukis-like spatulate rangeomorphs from Spaniard’s Bay (n = 6).

Comparison of stem length versus total specimen length among specimens of ... Available to Purchase

Published: 24 September 2020
Fig. 3. Comparison of stem length versus total specimen length among specimens of Beothukis mistakensis ( n = 10), Culmofrons plumosa ( n = 13) and undetermined Beothukis -like spatulate rangeomorphs from Spaniard’s Bay ( n = 6).
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Table 1. Measurements of complete, well preserved fronds from Spaniard's Ba... Available to Purchase

Published: 01 July 2009
Table 1. Measurements of complete, well preserved fronds from Spaniard's Bay. All measurements are in millimeters. Aa  =  Avalofractus abaculus , Cm  =  Charnia cf. C. masoni , Bm  =  Beothukis mistakensis , Tw  =  Trepassia wardae .
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Figure 5. Best-preserved specimen of Beothukis mistakensisBrasier and Antcliffe, 2009 from Spaniard's Bay. Scale bar represents 1 cm. NFM F-758. 1, photograph. 2, labelled sketch combining features visible with seven different angles of illumination around the specimen.

Figure 5. Best-preserved specimen of Beothukis mistakensis Brasier and An... Available to Purchase

Published: 01 July 2009
Figure 5. Best-preserved specimen of Beothukis mistakensis Brasier and Antcliffe, 2009 from Spaniard's Bay. Scale bar represents 1 cm. NFM F-758. 1 , photograph. 2 , labelled sketch combining features visible with seven different angles of illumination around the specimen.
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Figure 9. Morphometric plot of complete, well-preserved specimens of Avalofractus abaculus, Beothukis mistakensis, Trepassia wardae, and Charnia cf. C. masoni from Spaniard's Bay. Characters reflect the frond shape as it would have appeared on the sea floor, with the y-axis reflecting increasing relative stem length and the x-axis reflecting increasing circularity of the petalodium.

Figure 9. Morphometric plot of complete, well-preserved specimens of Avalo... Available to Purchase

Published: 01 July 2009
Figure 9. Morphometric plot of complete, well-preserved specimens of Avalofractus abaculus , Beothukis mistakensis , Trepassia wardae , and Charnia cf. C. masoni from Spaniard's Bay. Characters reflect the frond shape as it would have appeared on the sea floor, with the y-axis reflecting
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Geographic and stratigraphic context of the material considered in this study. A) Map of Newfoundland, Canada. B) Close-up of the Avalon Peninsula of Newfoundland with important sites indicated (Mistaken Point, Spaniard's Bay, and the Catalina Dome sections). C) Associated stratigraphic column with current chronostratigraphy (Matthews et al. 2020), the named members relate to the succession in the Catalina Dome (O'Brien and King 2004).

Geographic and stratigraphic context of the material considered in this stu... Available to Purchase

Published: 22 December 2020
Fig. 1.— Geographic and stratigraphic context of the material considered in this study. A ) Map of Newfoundland, Canada. B ) Close-up of the Avalon Peninsula of Newfoundland with important sites indicated (Mistaken Point, Spaniard's Bay, and the Catalina Dome sections). C ) Associated
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Small specimen previously attributed to Beothukis mistakensis from Spaniard’s Bay, excluded from the genus here. Note the presence of alternate branching across the frond centreline, with clear biserial (BS) primary-order branches on L6 (labelled following Narbonne et al.2009) and the narrow, radiating uniserial secondary-order rangeomorph branches, some of which are also biserial (see L5). Note the marked erosion at the margins, particularly in the region of the frond tip. Scale bar, 1 cm.

Small specimen previously attributed to Beothukis mistakensis from Spania... Available to Purchase

Published: 24 September 2020
Fig. 8. Small specimen previously attributed to Beothukis mistakensis from Spaniard’s Bay, excluded from the genus here. Note the presence of alternate branching across the frond centreline, with clear biserial (BS) primary-order branches on L6 (labelled following Narbonne et al. 2009
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Thin section images through selected fossil-bearing interfaces from the late Ediacaran of Newfoundland. See online Supplementary data text for full locality and stratigraphic information regarding these surfaces. A) The MUN Surface, with a thin but continuous mineralized veneer beneath a normally graded tuff. B) Bed BR5, with a mineralized veneer almost 1-mm thick within the lowermost portion of the over-bed. C) Bed H14, with a thin but continuous mineralized veneer. D) The ‘E’ Surface, with a coarse-grained, chloritized tuff, and no mineralized veneer. E) Bed MEL 7, with a thin but continuous mineral veneer. F) A ‘wisp' of framboidal pyrite within an under-bed, ∼ 0.5mm beneath the fossil-bearing surface at Spaniard's Bay (SB).

Thin section images through selected fossil-bearing interfaces from the lat... Available to Purchase

Published: 01 May 2016
but continuous mineral veneer. F ) A ‘wisp' of framboidal pyrite within an under-bed, ∼ 0.5mm beneath the fossil-bearing surface at Spaniard's Bay (SB).
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Representative examples of facies and facies associations. Scale bars (lower right corner of each image) = 5 cm long. (A) Poorly laminated siltstone (F4) overlain by fine-grained F2 turbidite (TBCDE) in the facies association (FA) 2 (Green Head; see Fig. 1 for locations). White arrows indicate foresets of cross-lamination in current ripples of the TC division. (B) Thin-section photograph showing discontinuous concentrations of silt-sized material (light coloured) in clay-mudstone (F4) and erosive contact with overlying Bouma TB division of an F2 bed. (C) Deformation of thin- and medium-bedded turbidites (F8) in FA5 (Bay Roberts south). (D) Medium- and thin-bedded parallel-laminated red mudstone (Bay Roberts). (E) Medium- to thin-bedded TDE turbidites of F1 in FA1 (Spaniard’s Bay). (F) Interbedded volcanic ash (F5), TDE turbidites (F1), and laminated siltstone (F4) with its characteristic “crinkly” appearance (Green Head).

Representative examples of facies and facies associations. Scale bars (lowe... Available to Purchase

Published: 02 March 2007
- and medium-bedded turbidites (F8) in FA5 (Bay Roberts south). (D) Medium- and thin-bedded parallel-laminated red mudstone (Bay Roberts). (E) Medium- to thin-bedded T DE turbidites of F1 in FA1 (Spaniard’s Bay). (F) Interbedded volcanic ash (F5), T DE turbidites (F1), and laminated siltstone (F4) with its