Home Multi-Country Search About Admin Login
Cenozoic
Cretaceous
Jurassic
Triassic
Permian
Carboniferous
Devonian
Silurian
Ordovician
Cambrian
Neoproterozoic
Mesoproterozoic

Search by
Select Region(s) to search
Hold Ctrl (Windows/Linux) or Command (Mac) to select multiple
Honggermiao Formation
Click to display on map of the Ancient World at:
Honggermiao Fm base reconstruction

Honggermiao Fm

Period: 
Devonian

Age Interval: 
D32 (4), Famennian (late Late Devonian)


Province: 
Inner Mongolia

Type Locality and Naming

The type section is located in Honggermiao area of Abag Qi (Banner), Inner Mongolia.

It was named by Ding Yunjie and Tong Zhengxiang in 1960, and formally quoted by Hou Hongfei et al. in 1979.


Lithology and Thickness

Siltstone and volcanics. The formation is characterized by arkose and calcareous siltstone intercalated with limestone lenses, and grayish-green to pink shale; and it may locally be intercalated with andesitic porphyrite. However, regionally, it "consists mainly of tuff, ..." The base consists of conglomerate. The outcropped thickness is about 210 m.


Lithology Pattern: 
Volcanic_ash


Relationships and Distribution

Lower contact

The base consists of conglomerate and lies unconformably on the underlying Wendurmaio Fm (or Group). [NOTE: reference strat chart for this column #4 region does not show this formation; but implied that the Late Devonian was entirely the Cailunguoshao Fm sandstone (which is probably more local?).]

Upper contact

The upper part is cut by faults.

Regional extent

Similar deposits can also be observed at Aomgenhuduge in Sonid Zuoqi (Left Banner); it extends latitudinally 100 km, consists mainly of tuff, metamorphosed sandstone and conglomerate intercalated with limestone lenses, and yields fauna and plant fossils.


GeoJSON

{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[114.9,44.28],[116.4,44.77],[116.71,45.31],[116.03,45.67],[114.57,45.39],[113.95,44.58],[114.9,44.28]]]]}}

Fossils

It yields coral: Nalivkinella profunda, Nickolsoniella sp.; brachiopods: Cyrtospirifer spp., Centrorhynchia turanica; and plant fossils Leptophloeum rhombicum.


Age 

Famennian (late Late Devonian)

Age Span: 
S

    Beginning stage: 
Famennian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
371.10

    Ending stage: 
Famennian

    Fraction up in the ending stage: 
0.75

    Ending date (Ma):  
362.25

Depositional setting


Depositional pattern:  


Additional Information


Compiler:  

(Hou Hongfei)