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select id,columnx from arkL_columns where dataset_id like 10

View/Edit arkL Database interval - PL4 [Atl.] pfZ

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The age-window currently being used to search for terms for autocompletion is -46.87 -> 53.16 Ma.

	interval above:	PL5 [Atl.] pfZ
parent-intervals:	this interval:	PL4 [Atl.] pfZ	sub-intervals:
	interval below:	PL3 pfZ

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Interval data

intervalx:	PL4 [Atl.] pfZhas added abv?yesid: 4281 sort:44
alternative_term:	block label:
formal term:	Dentoglobigerina altispira Highest Occurrence Zone
interval_type:
parent_interval:
dataset:	forams - planktic (dataset id = 10)
alt dataset:	(dataset id = )
TSC Column:	id:104
stage:
colour:
interval_notes:	Pliocene Foram Zone "PL4" Dentoglobigerina altispira Highest Occurrence Zone, was the ’Sphaeroidinellopsis seminulina -Dentoglobigerina altispira Interval Zone’ = LAD of Sphaeroidinellopsis seminulina to LAD of Dento. altispira (Berggren et al., 1995). It may span a portion of Zone N21 of Blow (1979). This interval barely exists -- Berggren et al. (1995) and Wade et al’11 estimated a duration of 30,000 yr in the Atlantic (but older and longer in Pacific); and this scale has about 20,000 yr! It is essentially equivalent to the lower Kaena polarity subchron (C2An.1r).
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:		3.1300	<---	LAD Dentoglobigerina altispira [Atl.]	6123	0.0000		3.13	00003.1300
Base:		3.1600	<---	LAD Sphaeroidinellopsis seminulina [Atl.]	6124	0.0000		3.16	00003.1600
base notes	Base PL4 (or, due to LAD, then top of PL3, and alternate for top of Zone N20). NOTE that calibrations imply NO DURATION of Zone PL4 in Atlantic; and extremely brief (but earlier) elsewhere. To avoid confusion on graphics, the base of PL4 has been lowered by 0.01 myr (3.14 Ma, instead of 3.13 Ma in Lourens et al., 2004 compilation). Astronomically tuned as 3.14 Ma from Atlantic ODP Sites 925 & 926. Wade et al. (2011) used this 3.16 Ma age. This LAD is reported as slightly earlier (3.17 Ma) in astronomically tuned eastern Mediterranean and much earlier (3.59 Ma) at astronomically tuned Pacific ODP Legs 111 and 138. Berggren et al. (1995) assigned as base Kaena (3.12 Ma = C2An.1r.0) and noted that Pliocene foram ’Sphaeroidinellopsis seminulina’ LAD occurs about 0.1 m.y. earlier (top of Mammoth, or 3.21 Ma) in the Mediterranean. [M: Lourens et al. (1996a), Zachariasse et al. (1989), Hilgen (1991b); SA: Chaisson & Pearson (1997), Shipboard Scientific Party (1995), Tiedemann & Franz (1997), Berggren et al. (1995b); EP: Mix et al. (1995), Shipboard Scientific Party (1990), Shackleton et al. (1995a)]				comp notes

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