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select id,columnx from arkL_columns where dataset_id like 10

View/Edit arkL Database interval - M13a pfSZ

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The age-window currently being used to search for terms for autocompletion is -41.42 -> 59.89 Ma.

	interval above:	M13b pfSZ
parent-intervals:M13 pfZ;	this interval:	M13a pfSZ	sub-intervals:
	interval below:	M9b pfSZ

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Interval data

intervalx:	M13a pfSZhas added abv?yesid: 4332 sort:121
alternative_term:	block label:a
formal term:	Neogloboquadrinaacostaensis Lowest-occurrence Subzone
interval_type:
parent_interval:
dataset:	forams - planktic (dataset id = 10)
alt dataset:	(dataset id = )
TSC Column:	id:108
stage:
colour:
interval_notes:	M13a" is the ’Neogloboquadrina acostaensis -Globigerinoides extremus/Globorotalia plesiotumida Interval SubZone’ (FAD of Neobloboquadrina acostaensis to FAD of Globig. extremus and/or Globorot.plesiotumida) (Berggren et al., 1995), and is equivalent to Zone ’N16’ of Blow (1979). FAD of Globorotalia plesiotumida is difficult to determine under some conditions. See extended discussion of subzone M13a/M13b limits in Berggren et al. (1995).
compilation_notes:
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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:		8.5800	<---	FAD Globorotalia plesiotumida	6184	0.0000		8.58	00008.5800
Base:		9.8900	<---	FAD Neogloboquadrina acostaensis [subtropical]	6195	0.0000		9.89	00009.8900
base notes	DASHED -- Astronomically tuned in the South Atlantic and Eastern Mediterranean. This FAD is younger (9.8 Ma) in Atlantic Sites 925 & 926; and put as 9.89 Ma by Wade (in GTS2020). This FAD is reported older (10.57 Ma) in cycle-calibrated in Eastern Mediterranean. Wade et al. (2011) expound further: "The cyclostratraphic age of the LO of Neogloboquadrina acostaensis (9.83 Ma) is derived from Ceara Rise (Chaisson and Pearson, 1997). This calibration was adopted by Lourens et al. (2004) and is significantly younger (1.07 myr) than in Berggren et al. (1995a) (10.90 Ma) and would move this event from early Subchron C5n.2n to Subchron C5n.1n. Turco et al. (2002) noted the diachrony of the LO of Neogloboquadrina acostaensis between low latitudes and the Mediterranean. The age used in Berggren et al. (1995a) is calibrated to the magnetostratigraphy at Site 563 (Miller et al., 1985) and the discrepancy in calibrated ages may be due to further diachrony between the tropical and subtropical Atlantic Ocean, however, we note that the order of bioevents is consistent between Ceara Rise and Site 563." Berggren et al. (1995) note that ’Neogloboquadrina acostaensis’ FAD is calibrated in Holes 558 and 563 and 608 in the North Atlantic at the base of chron C5n = C5n.2n; 10.9 Ma (= C5n.2n.05). Lourens et al (GTS2004) also uses LAD of P. siakensis to mark their version of M11/12 and N14/15 zonal boundaries; but this would be diachronous with Atlantic. [NA: Berggren et al. (1985a), Miller et al. (1985), Miller et al. (1991); SA: Chaisson & Pearson (1997), Shackleton & Crowhurst (1997), Turco et al. (2002)]				comp notes

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