arkL edit event

arkL

View/Edit arkL Database event - LADb Reinhardtites levis

NB The age of the event may be set by placement within an interval (pup), placement between 2 events (pub), offset from an event or as a preset.
If data is given for more than one of these the priority is preset over offset over pub over pup.

Navigation

The age-window currently being used to search for terms for autocompletion is 20.143 -> 120.143 Ma.event above: FADb Lithraphidites quadratus
event below: LADb Tranolithus orionatus

base event of: UCb19; NK3 - 5; KN1 - 5;
top event of: UCb18; NK6; KN6 - 7;

Mode selector

if you were a logged in editor there would be an input button here

Event data

term:

Id:4475 sort: 20

Event Type:

Event Display:

TSC Column:

id:193

Taxon:

dataset:

nannos Boreal (dataset id = 14)

stage:

notes_2004:

notes_2020:

A calibration of Chron C31r.6 is used here.  Watkins has calibrated it as 1 precession cycle below a 70.06 Ma Ar-Ar age (hence 70.08, ignoring uncertainty on Ar-Ar age).   Burnett’98 schematically shows as about 85% up in B. sumensis Belemnite Zone (NW Europe); but Voight et al (2011, submitted to EPSL) show it as midway in that Zone, synchronous with Gubbio, and correlate to about Chron C31r.5 (70.3 Ma in GTS2012 magnetics).  "Just above the FAD of planktonic foraminifer R. fructosa" (Huber et al’08, who placed it 0.18 myr above = 69.9 Ma in GTS2012 foram scaling based on Huber et al’s tables).  Bralower et al (1995) suggest using this LAD to subdivide NC21 into a/b subzones; but the GTS2004 ages would imply very short durations, so omitted here.  ODP age is 69.8 Ma, but EGI database (2005) calibrates as much higher at 68.4 Ma (North Sea) and 68.6 (Tethys).  This younger age would probably require the overlying succession to also be pushed "higher" to retain same sequence.  SEPM’98 assigned LAD in Tethys as top of H. ricolleti Zone of N.Amer., which is about 1 myr Higher.   SEPM’98 had assigned LAD in Boreal as top of B. clinolobatus (base of H. birkelundi) ammonite = Late/Early Maastr. boundary.

compilation_notes:

refs to add:

linked refs:

Bralower et al. 1995;Burnett 1998;Huber et al. 2008;Voigt et al. 2012;

Placement by pup

up within interval: id: 2688

Placement by pub

	higher event:	id: (Ma)
	lower event:	id: (Ma)

Placement by offset

offset from event: link to event: (id: )

preset_age:

preset_age_notes:

Age

70.143 Δ=0

Tracecode:

; Q4 event from base+duration defined interval Equation:

Age 2020

Original age 2020 (where age has been corrected by me)

if you were a logged in editor there would be an input button here

Go to: arkLpopulate :: arkL data upload

Event References

Bralower, T. J., et al. (1995). An integrated Cretaceous microfossil biostratigraphy. In, Berggren, W. A. , Kent, D. V. , and Hardenbol, J. (ed.) Geochronology, Time Scales and Global Stratigraphic Correlations: A Unified Temporal Framework for a Historical Geology. SEPM Special Publication . 54: 65-79. gs

Burnett, J. A. (1998). Upper Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. London: Chapman & Hall 132-199. gs

Huber, B. T., MacLeod, K. G. & Tur, N. A. (2008). Chronostratigraphic framework for Upper Campanian-Maastrichtian sediments on the Blake Nose (subtropical North Atlantic). Journal of Foraminiferal Research. 38: 162-182. gs

Voigt, S., et al. (2012). Global correlation of Upper Campanian-Maastrichtian successions using carbon isotope stratigraphy: development of a new Maastrichtian timescale. Newsletters on Stratigraphy. 45: 25-53. gs

Dataset References

Bown, P. R. & Cooper, M. K. E. (1998). Jurassic. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series . 34-85. gs

Bown, P. R. (ed. ) (1998b). Calcareous nanofossils biostratigraphy. Chapman and Hall. London,. 1-314. gs

Bown, P. R., et al. (1998). Lower Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. London: Chapman & Hall 86-131. gs

Burnett, J. A. (1998). Upper Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. London: Chapman & Hall 132-199. gs

Raffi, I., Wade, B. S. & Pälike, H. (2020). Chapter 29 - The Neogene Period. In, Gradstein, F. M. , Ogg, J. G. , Schmitz, M. D. , and Ogg, G. M. (ed.) The Geologic Time Scale 2020. Elsevier, Boston, MA 2: 1141-1217. gs