0.0–12.5 m
Stromatoporoid biostromli massiv kulrang ohaktosh; eng yuqori Pragian.
01
GSSP
Zinzilban kesimi — GSSP
Quyi devon · 416.0–397.0 Ma
Overview
Pastki devon davrining Pragian–Emsian chegarasi uchun YUNESKO tomonidan tasdiqlangan global stratotip kesim. Kitob geoparkining asosiy ilmiy yutug'i.
- Period
- Quyi devon · 416.0–397.0 Ma
Fauna
Tabulyat marjonlari
-
Favosites styriacus, Squameofavosites bohemicus, Pachyfavosites polymorphus
Characteristic Pragian–Emsian boundary assemblage.
Rugoz marjonlari
-
Calceola sandalina, Phacelophyllum kunthi
Brakhiopodlar
-
Howellella mercuri, Eoreticularia magna, Atrypa reticularis
Index brachiopods used to constrain the GSSP boundary.
Trilobitlar
-
Asteropyge zinzilbanensis, Phacops sp.
Konodontlar
-
Polygnathus dehiscens, Polygnathus excavatus
GSSP marker species — first appearance defines the Pragian–Emsian boundary.
Stratigraphy
-
-
12.5–18.0 m
Brakhiopod parchalari bilan boy krinoidli granystounlar — Pragian–Emsian chegarasi.
-
18.0–31.7 m
Polygnathus dehiscens beradigan to'q rangli argillit ohaktosh — rasmiy GSSP marker qatlami.
-
31.7–55.0 m
Cherty tugunlari bilan qatlamli ohaktosh; bazal Emsian.
Location
- Latitude
- 38,850000
- Longitude
- 66,950000