arkL edit interval

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select id,columnx from arkL_columns where dataset_id like 80

View/Edit arkL Database interval - Guanling Fm. (Guanling)

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The age-window currently being used to search for terms for autocompletion is 189.48 -> 291.46 Ma.

	interval above:	Yangliujing Fm.
parent-intervals:Guanling region, Guizhou (South margin of Yangtze platform);	this interval:	Guanling Fm. (Guanling)	sub-intervals:
	interval below:	Xinyuan Fm. (Guandao)

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Interval data

intervalx:	Guanling Fm. (Guanling)has added abv?id: 7322 sort:168
alternative_term:	block label:
formal term:
interval_type:
parent_interval:
dataset:	strat - Yangtse Platform (China, Tr) (dataset id = 80)
alt dataset:	(dataset id = )
TSC Column:	id:169
stage:
colour:
interval_notes:	“variegated shale, argillaceous limestone, and dolomite in the lower part, limestone and dolomitic limestone in the upper part, 500-912 m thick” (Guizhou Bureau, 1987). It forms a distinctive ledge-and-slope topography with low relief, owing to many intervals of terrigenous mudrock and argillaceous carbonates interspersed with more resistant limestone and dolostone, particularly in the lower part. Cyclicity is marked in the Guanling deposits toward the platform margin. A typical cycle consists of a grain-supported bioclastic, intraclastic, or oolitic base; a muddier midsection with sparse mollusks, fenestrae, and local desiccation cracks; and a laminated dolomudstone cap, in some cases disrupted to form tepee structures." (Enos et al., 2006). Base placed here at base of Ladinian, because Anisian will shift to Guandao section. In Wayao region, the underlying formation is a thick Yonningzhen Fm, that is assigned as Olenekian (and into Anisian?).
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:		239.4800	<---	base Yangliujing Fm.	9412	0.0000	Longobardian	239.48	00239.4800
Base:		241.4600	<---	base Guanling Fm. (Guanling)	9413	0.0000	Ladinian	241.46	00241.4600
base notes	Base placed here at base of Ladinian, because Anisian will shift to Guandao section.				comp notes

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Interval References

Dataset References

Enos, P., et al. (2006). Triassic Evolution of the Yangtze Platform in Guizhou Province, People’s Republic of China. Geological Society of America, Special Papers. 417: 1-105. gs

Lehrmann, D. J., et al. (2015). An integrated biostratigraphy (conodonts and foraminifers) and chronostratigraphy (paleomagnetic reversals, magnetic susceptibility, elemental chemistry, carbon isotopes and geochronology) for the Permian-Upper Triassic strata of Guandao section, Nanpanjiang Basin, south China. Journal of Asian Earth Sciences. 108: 117-135. gs