Bumbanian
Encyclopedia
The Bumbanian is an Asian Land Mammal Age (ALMA), a large biozone
which corresponds to ages between 55.8—46.8 Ma for finds of fossil mammal
s in Asia
. This zone lies within the Ypresian
stage of the Eocene
series
. It follows the Gashatan
ALMA and precedes the Arshantan
ALMA.
Biozone
Biostratigraphic units or Biozones are intervals of geological strata that are defined on the basis of their characteristic fossil taxa....
which corresponds to ages between 55.8—46.8 Ma for finds of fossil mammal
Mammal
Mammals are members of a class of air-breathing vertebrate animals characterised by the possession of endothermy, hair, three middle ear bones, and mammary glands functional in mothers with young...
s in Asia
Asia
Asia is the world's largest and most populous continent, located primarily in the eastern and northern hemispheres. It covers 8.7% of the Earth's total surface area and with approximately 3.879 billion people, it hosts 60% of the world's current human population...
. This zone lies within the Ypresian
Ypresian
In the geologic timescale the Ypresian is the oldest age or lowest stratigraphic stage of the Eocene. It spans the time between and , is preceded by the Thanetian age and is followed by the Eocene Lutetian age....
stage of the Eocene
Eocene
The Eocene Epoch, lasting from about 56 to 34 million years ago , is a major division of the geologic timescale and the second epoch of the Paleogene Period in the Cenozoic Era. The Eocene spans the time from the end of the Palaeocene Epoch to the beginning of the Oligocene Epoch. The start of the...
series
Series (stratigraphy)
Series are subdivisions of rock layers made based on the age of the rock and corresponding to the dating system unit called an epoch, both being formally defined international conventions of the geological timescale. A series is therefore a sequence of rock depositions defining a...
. It follows the Gashatan
Gashatan
The Gashatan is an Asian Land Mammal Age, a large biozone which corresponds to ages between 58.7—55.8 Ma for finds of fossil mammals in Asia. This zone lies within the Thanetian stage of the Paleocene series. It precedes the Bumbanian....
ALMA and precedes the Arshantan
Arshantan
The Arshantan age is a period of geologic time within the Early Eocene epoch of the Paleogene used more specifically with Asian Land Mammal Ages. It follows the Bumbanian age and precedes the Irdinmanhan age....
ALMA.