Were transgressive black shales a negative feedback modulating glacioeustasy in the Early Palaeozoic Icehouse?

2018 ◽  
pp. 123-156 ◽  
Author(s):  
A.A. Page ◽  
J.A. Zalasiewicz ◽  
M. Williams ◽  
L.E. Popov
Keyword(s):  
Negative Feedback ◽  
Black Shales ◽  
Early Palaeozoic

scholarly journals Ordovician turbidites and black shales of Bennett Island (De Long Islands, Russian Arctic), and their significance for Arctic correlations and palaeogeography

2020 ◽  
Vol 157 (8) ◽  
pp. 1207-1237
Author(s):  
Maria K. Danukalova ◽  
Alexander B. Kuzmichev ◽  
Nikolai V. Sennikov ◽  
Tatiana Yu. Tolmacheva
Keyword(s):  
Carbonate Platform ◽  
Black Shales ◽  
The Arctic ◽  
New Siberian Islands ◽  
Faunal Assemblages ◽  
Lower Palaeozoic ◽  
Early Palaeozoic ◽  
First Time ◽  
Remote Part ◽  
Siberian Shelf

AbstractBennett Island stands alone in a remote part of the Arctic and information on its geology is essential to ascertain relations with other terranes in order to restore the early Palaeozoic Arctic palaeogeography. Lower Palaeozoic sedimentary rocks throughout the island were studied thoroughly for the first time. The Ordovician section (> 1.1 km thick) comprises three units: Tremadocian, lowest Floian black shale (130–140 m); Floian, lower Dapingian carbonate turbidite (> 250 m); and Dapingian, lower Darriwilian siliciclastic turbidite (> 730 m). Ordovician deposits conformably overlie Cambrian rocks deposited within the Siberian shelf, as shown earlier. Most of the Ordovician succession was formed in a deep trough that received carbonate debris from a nearby carbonate platform and silicate material from a distant landmass located to the NE (present coordinates). The Bennett Island Ordovician rocks have much in common with those of both the Central and Northern Taimyr belts. It could be tentatively suggested that both belts merged at their eastern continuation in the vicinity of De Long Islands. The whole system probably extends further eastwards. The Ordovician facies patterns and faunal assemblages in the New Siberian Islands are notably similar to those of northwestern Alaska, where the same lateral transition from turbidites to shelf limestones was reported.

Ratee Reactions: Negative Feedback as a Motivating Force

2011 ◽  
Author(s):  
Adam H. Kabins ◽  
Stephanie C. Payne ◽  
Mindy E. Bergman ◽  
Elizabeth Umphress
Keyword(s):  
Negative Feedback

OPTICAL TRANSISTORS WITH NEGATIVE FEEDBACK

1988 ◽  
Vol 49 (C2) ◽  
pp. C2-19-C2-22
Author(s):  
P. MANDEL ◽  
S. D. SMITH
Keyword(s):  
Negative Feedback
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