Topic
Periodon
About: Periodon is a research topic. Over the lifetime, 7 publications have been published within this topic receiving 144 citations.
Papers
TL;DR: In this article, seven samplcs from the Limcstonc and Boulder Conglomerate Members of the Bulltinden Formation have been found to have poorly prcscrvcd conodonts.
Abstract: Seven samplcs from the Limcstonc and Boulder Conglomerate Members of the Bulltinden Formation have yicldcd poorly prcscrvcd conodonts. On tentative identifications Periodon aculeatus Hadding and Prioniodus cf. P. alobatus Bergstrom at the basc of thc formation suggest an Ordovician lower Caradoc, or older agc. This confirms that the Vcstgotabrccn Formation unconformably beneath underwent highpressure metamorphism during the Taconic and/or Finmarkian phases of the Caledonian orogeny. The conodonts show affinity to the North Atlantic Province suggesting a deeper water marine depositional cnvironmcnt. Conodont colour alteration indiccs of five indicate that the Bulltinden Formation was heated to tcmpcraturcs in cxcess of 3°K. probably during thc middle-upper Silurian main Caledonian uplift cvcnt.
32 citations
TL;DR: This article recovered conodonts from a dolostone lens in carbonaceous schist 30 m below the base of the Pinney Hollow Formation in the Eastern Cover sequence near West Bridgewater, Vermont.
Abstract: Middle Ordovician (late Arenigian - early Caradocian) conodonts were recovered from a dolostone lens in carbonaceous schist 30 m below the base of the Pinney Hollow Formation in the Eastern Cover sequence near West Bridgewater, Vermont. These are the first reported fossils from the metamorphic cover sequence rocks east of the Green Mountain, Berkshire, and Housatonic massifs of western New England. The conodonts are recrystallized, coated with graphitic matter, thermally altered to a color alteration index (CAI) of at least 5, and tectonically deformed. The faunule is nearly monospecific, consisting of abundant Periodon aculeatus Hadding? and rare Protopanderodus. The preponderance of Periodon and the absence of warm, shallow-water species characteristic of the North American Midcontinent Conodont Province suggest a slope or basin depositional setting. The conodont-bearing carbonaceous schist is traceable 3 km southeast to the Plymouth area, where it had been designated the uppermost member of the Plymout...
16 citations
8 citations
TL;DR: A well preserved Late Ordovician conodont fauna of 18 species has been recovered from seven limestone samples of the Gongwusu section in the Wuhai area of Inner Mongolia, North China as mentioned in this paper.
Abstract: . A well preserved Late Ordovician conodont fauna of 18 species has been recovered from seven limestone samples of the Gongwusu section in the Wuhai area of Inner Mongolia, North China. This conodont fauna is composed of Ansella sp., Belodina monitorensis, Coelocerodontus trigonius, Complexodus sp., Dapsilodus viruensis, Drepanoistodus sp., Gen. et sp. indet, Oslodus semisymmetricus, Panderodus gracilis, Periodon cf. aculeatus, Protopanderodus cf. cooperi, P. varicostatus, Protopanderodus sp., Pseudooneotodus mitratus, Scabbardella altipes, Venoistodus cf. balticus, Yaoxianognathus sp. A, and Yaoxianognathus sp., and shows a mixture of North Atlantic, North China and North American Midcontinent affinities. The presence of Belodina monitorensis, Periodon cf. aculeatus, Protopanderodus varicostatus, Scabbardella altipes and Yaoxianognathus sp. A in the fauna indicates an early Sandbian (late Sa1) age. The fauna is dominated by Periodon cf. aculeatus, Scabbardella altipes and Panderodus gracilis and ...
6 citations
Journal Article•
1 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2017 | 1 |
| 1999 | 1 |
| 1986 | 1 |
| 1983 | 1 |
| 1981 | 1 |
| 1980 | 1 |