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select id,columnx from arkL_columns where dataset_id like 2

View/Edit arkL Database interval - Dactylioceras tenuicostatum TAZ

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The age-window currently being used to search for terms for autocompletion is 133.1589 -> 234.2001 Ma.

	interval above:	Harpoceras serpentinum TAZ
parent-intervals:	this interval:	Dactylioceras tenuicostatum TAZ	sub-intervals: Dactylioceras semicelatum TAsZ; Protogrammoceras paltus TAsZ;
	interval below:	Emaciaticeras emaciatum TAZ

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Interval data

intervalx:	Dactylioceras tenuicostatum TAZhas added abv?yesid: 484 sort:361
alternative_term:	D. tenuicostatum TAZblock label:
formal term:
interval_type:
parent_interval:
dataset:	ammonites Tethyan (dataset id = 2)
alt dataset:	(dataset id = )
TSC Column:	id:15
stage:
colour:
interval_notes:	Full name = Dactylioceras (Orthodactylites) tenuicostatum.
compilation_notes:
refs to add:
linked refs:
preset_duration:
preset_duration_notes:
tracecode	; Q2top from event age; Q1base from event age; Q3a duration from base & top

	age2020	age		event	event_id	pup	in interval	age	age2020
Top:		183.1589	<---	base Harpoceras serpentinum TAZ	327		Toarcian	183.1589	00183.1588
Base:		184.2001	<---	base Dactylioceras tenuicostatum TAZ	329		Toarcian	184.2001	00184.2000
base notes	Full name = Dactylioceras (Orthodactylites) tenuicostatum. Base-Toarcian FIXED as 184.2 Ma based on constraints from radiometric dates above/below. Duration based on percent-up in Mochras borehole. In GTS2016, base was 183.7 Ma ±0.5 based on 183.16 ±0.11 Ma in boundary within D.tenuicostatum zone in Argentina (Riccardi, 2012) and 183.22 ±0.25 Ma on in uppermost Dactylioceras in Peru (Sell et al., 2014) -- (was 182.7 Ma in GTS2012 = Karoo lavas [same dates using mean ArAr converted (Jourdan et al., 2007) with ±0.7 and UPb (EGU abstract by Moulin et al., 2010) with ±0.4)]] assumption that this is onset of LOWER C13 excursion (fits R-polarity); but shifted to 182.5 to better fit UPb on OAE. This fits clustering of Karoo sills at 183.1 Ma (Svenson et al.,2012) assumed to be beginning of OAE. Relative duration of zone was 0.3 myr from Linear Sr isotope trend; but Os-isotopes (Cohen-Coe et al.) and Cycles (Suan et al., 2008, has ca. 0.8; and Huang, 2010, pers. comm. has 1.0) suggest it is much longer. GTS2016 used Suan's 0.8 myr (which is published), plus 0.2 for condensed boundary (Bodin et al'11). Subzones scaled according to equivalences to Boreal equal-subzone divisions.				comp notes

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