- The
Hettangian is the
earliest age and
lowest stage of the Jur****ic
Period of the
geologic timescale. It
spans the time
between 201.3 ± 0.2 Ma and 199...
-
conocauda is
known from
Posidonia Shale, and C.
montefiorei is
known from the
Hettangian strata of the Blue Lias
Formation and from
Charmouth Mudstone Formation...
-
Early Jur****ic, but also
including part of the
preceding Rhaetian. The
Hettangian Stage was
named by
Swiss palaeontologist Eugène
Renevier in 1864 after...
- chronostratigraphy). It was
preceded by the
Norian and
succeeded by the
Hettangian (the
lowermost stage or
earliest age of the Jur****ic). The base of the...
- "flat stone".
There has been some
debate over the
actual base of the
Hettangian Stage, and so of the Jur****ic
System itself. Biostratigraphically, the...
- Formation,
United Kingdom, Rhaetian/
Hettangian Orthophlebia varia Martynova 1948
Dzhil Formation, Kyrgyzstan,
Hettangian-Sinemurian
Orthophlebia venosa Martynov...
-
meaning 'lizard') is a
genus of
ichthyosaurs from the
Early Jur****ic (
Hettangian - Pliensbachian) of
Europe (Belgium, England,
Germany and Portugal). Some...
-
Sinemurian is
preceded by the
Hettangian and is
followed by the Pliensbachian. In
Europe the
Sinemurian age,
together with the
Hettangian age, saw the deposition...
- A frog is any
member of a
diverse and
largely carnivorous group of short-bodied,
tailless amphibians composing the
order Anura (coming from the Ancient...
- Belemnitida.
These cephalopods existed in the
Early Jur****ic
period from the
Hettangian age (196.5–199.6 mya) to the
Toarcian age (175.6–183.0). They were fast-moving...
