arkL edit interval

arkL

select id,columnx from arkL_columns where dataset_id like 10

View/Edit arkL Database interval - N8

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The age-window currently being used to search for terms for autocompletion is -34.88 -> 66.39 Ma.

	interval above:	N9
parent-intervals:	this interval:	N8	sub-intervals:
	interval below:	N7

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Interval data

intervalx:	N8has added abv?id: 4402 sort:0
alternative_term:	block label:
formal term:
interval_type:
parent_interval:
dataset:	forams - planktic (dataset id = 10)
alt dataset:	(dataset id = )
TSC Column:	id:117
stage:
colour:
interval_notes:
compilation_notes:
refs to add:
linked refs:
preset_duration:
preset_duration_notes:
tracecode	; Q1base from event age; Q2top from event age; Q3a duration from base & top

	age2020	age		event	event_id	pup	in interval	age	age2020
Top:		15.1200	<---	FAD Orbulina suturalis	6235	0.0000		15.12	00015.1200
Base:		16.3900	<---	FAD Praeorbulina sicana	6244	0.0000		16.39	00016.3900
base notes	Trilobatus sicanus = Mikrotax entry for this"Part of the evolutionary series from Trilobatus to Orbulina [editor’s comment - JRY 2018]"; but Praeorbulina sicana retained here as previous common usage on charts/zones. Age of 16.97 Ma was estimated from Atlantic ODP Sites 925 & 926; in Lourens et al. (2004) -- however this implied revised calibration to polarity chrons would seem to invert Medit. zones Mt4b and Mt5a of Berggren et al. (1995a). Berggren et al. (1995a) assign age as Chron C5Cn.2n (mid) and write: "LAD P. sicana occurs in interval of no paleomagnetic data about 20 m above FAD P. sicana which occurs in anom. 5C correlative in Hole 516 (Berggren et al., 1983)." Wade et al. (2011) write: ’Praeorbulina taxa are rare at Ceara Rise (Pearson and Chaisson, 1997) and therefore were not included in the revised calibration, and we have retained the ages reported in Berggren et al. (1995a) for FAD Orbulina suturalis (15.1 Ma), FAD Praeorbulina circularis, (16.0 Ma), FAD Praeorbulina curva (16.3 Ma) and Praeorbulina sicana (16.4 Ma)." We tentatively follow the Wade et al. (2011) assessment until further sites are investigated.				comp notes

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