A Lower Cambrian shallow-water occurrence of the branching ‘deep-water’ type trace fossilDendrorhaphe from the Lontova Formation, eastern Latvia

Jensen, Søren Rosendal; Mens, K

doi:10.1007/bf02987992

Cited by 22 publications

(13 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Evidence of the evolution of behaviour of early infaunal animals is offered mostly by trace fossils from the Swedish Mickwitzia Sandstone (Jensen ) and coeval coarse clastics of Poland (Pacześna ), the Ukraine (Palij et al . ; Dzik ), Latvia and Estonia (Jensen & Mens , ), China, Newfoundland (Droser et al . ) and others (e.g.…”

mentioning

confidence: 99%

The Tommotian phase of the Early Cambrian Agronomic Revolution in the carbonate mud environment of central Siberia

Mazurek

2014

LET

View full text Add to dashboard Cite

The profound ecological change of the marine benthos that eventually led to the almost complete destruction of the Precambrian matgrounds by benthic grazers and bioturbators (the agronomic revolution) was largely completed in the Tommotian. At that time, burrows produced by bottom‐dwelling animals as shelters against predators were supplemented by burrowing for food by predators and sediment feeders. The limy mud ichnofauna of that age in Siberia was very different from the roughly coeval sand bottom faunas of Baltica. Although the exact zoological identity of the animals forming the infaunal Tommotian traces remains unknown, they probably mostly represent various kinds of early nemathelminthes. No apparent locomotion traces of mollusc origin have been encountered in the Early Cambrian, despite the abundant occurrence of skeletal fossils attributed to molluscs. Possibly the standard muscular foot, typical of modern molluscs, had not yet developed. Ichnotaxa represented are Teichichnus isp., Rhizocorallium isp., Chondrites isp., possibly the Buren ichnocomplex and others.

show abstract

mentioning

confidence: 99%

The Tommotian phase of the Early Cambrian Agronomic Revolution in the carbonate mud environment of central Siberia

Mazurek

2014

LET

View full text Add to dashboard Cite

show abstract

“…Across its >500 km extent, the Lontova Formation rests transgressively above sediments of the ‘Rovno’ (latest Ediacaran to Fortunian) or ‘Kotlin’ (latest Ediacaran) regional Baltic stages, or directly on Proterozoic crystalline gneissic basement (Mens et al . ; Jensen & Mens ). Despite its homogeneity, it is possible to recognize four subdivisions of the Lontova Formation, based primarily on differences in the relative ratios of sediment types.…”

Section: Geological Settingmentioning

confidence: 98%

“…Lontova and Voosi mudstones are pervasively laminated, with a characteristic pattern of small (mm‐scale) lightly pyritized meandroid trace fossils, suggesting a persistently dysoxic water column (Mens & Pirrus ; Palij et al . ; Jensen & Mens , ).…”

Section: Geological Settingmentioning

confidence: 99%

Small carbonaceous fossils (SCFs) from the Terreneuvian (lower Cambrian) of Baltica

2018

View full text Add to dashboard Cite

We describe a new assemblage of small carbonaceous fossils (SCFs) from diagenetically minimally altered clays and siltstones of Terreneuvian age from the Lontova and Voosi formations of Estonia, Lithuania and Russia. This is the first detailed account of an SCF assemblage from the Terreneuvian and includes a number of previously undocumented Cambrian organisms. Recognizably bilaterian-derived SCFs include abundant protoconodonts (total-group Chaetognatha), and distinctive cuticular spines of scalidophoran worms. Alongside these metazoan remains are a range of protistan-grade fossils, including Retiranus balticus gen. et sp. nov., a distinctive funnel-shaped or sheet-like problematicum characterized by terminal or marginal vesicles, and Lontohystrichosphaera grandis gen. et sp. nov., a large (100-550 lm) ornamented vesicular microfossil.Together these data offer a fundamentally enriched view of Terreneuvian life in the epicratonic seas of Baltica, from an episode where records of non-biomineralized life are currently sparse. Even so, the recovered assemblages contain a lower diversity of metazoans than SCF biotas from younger (Stage 4) Baltic successions that represent broadly equivalent environments, echoing the diversification signal recorded in the coeval shelly and trace-fossil records. Close comparison to the biostratigraphical signal from Fortunian small shelly fossils supports a late Fortunian age for most of the Lontova/Voosi succession, rather than a younger (wholly Stage 2) range.

show abstract

“…-Comparable spiral trace fossils are known from the Khmelnitsky Formation of the Ukraine (Fedonkin 1983), the Voosi and Lükati formations of Estonia (Jensen & Mens 1999;Jensen, unpublished observation), northern Poland (PaczeÊna 1996), the Mazowsze Formation of south-eastern Poland (Fedonkin 1981;PaczeÊna 1986PaczeÊna , 1996, the Mickwitzia sandstone of south-central Sweden (Jensen 1997), the Grammajukku Formation of northern Sweden (Moczyd∏owska et al 2001), and the Torneträsk Formation of the Dividalen Group (Jensen & Grant 1998). Gyrolithes polonicus appears close to the base of the Cambrian in the Ukraine and Poland, and ranges into trilobite-bearing strata in northern Poland, Estonia and central Sweden (Jensen 1997).…”

Section: Gyrolithes Polonicusmentioning

confidence: 99%

Trace fossils from the Dividalen Group of northern Finland with remarks on early Cambrian trace fossil provincialism

Systra¹,

Jensen²

2006

GFF

Self Cite

View full text Add to dashboard Cite

The Dividalen Group is exposed in a narrow zone along the eastern Caledonian front of northern Fennoscandia. Trace fossils provide important age constraints in these largely siliciclastic strata and demonstrate that in Sweden the entire Dividalen Group is of Cambrian age. Here we provide the first detailed description of trace fossils from the Dividalen Group in Finland, based on new material from the Kilpisjärvi area. This material includes the vertical spiral Gyrolithes polonicus and trace fossils with a three-lobed lower surface, here informally described as the Bure ichnocomplex. These trace fossils have a wide distribution in Baltica and probably represent a rare case of trace fossil provincialism.

show abstract

A Lower Cambrian shallow-water occurrence of the branching ‘deep-water’ type trace fossilDendrorhaphe from the Lontova Formation, eastern Latvia

Cited by 22 publications

References 17 publications

The Tommotian phase of the Early Cambrian Agronomic Revolution in the carbonate mud environment of central Siberia

The Tommotian phase of the Early Cambrian Agronomic Revolution in the carbonate mud environment of central Siberia

Small carbonaceous fossils (SCFs) from the Terreneuvian (lower Cambrian) of Baltica

Trace fossils from the Dividalen Group of northern Finland with remarks on early Cambrian trace fossil provincialism

Contact Info

Product

Resources

About