Citation

Plane, M.D., 1967. Stratigraphy and vertebrate fauna of the Otibanda Formation, New Guinea. Bulletin  086. Bureau of Mineral Resources, Geology and Geophysics, Canberra.

Abstract

Late Tertiary intermontane lacustrine and fluviatile deposits in the Morobe District of New Guinea contain vertebrate fossils in association with dated pyroclastic rocks. Metamorphic rocks ranging in age from probable Palaeozoic to middle or late Cretaceous form a complex basement into which granodiorite plutons were intruded in the late Cretaceous or early Tertiary. From probable Oligocene or Miocene time porphyritic rocks intruded the metamorphics and granodiorite; this activity culminated in explosive vulcanism which produced vast quantities of agglomerate. The agglomerate blocked the drainages, and lacustrine and laterally restricted floodplain deposits formed behind the dams during the Pliocene. A formation, the Otibanda Formation, which includes lacustrine sediments, f100dplain deposits, and interbedded tuffs is formally defined. Its thickness cannot be estimated, but a measured section is more than 2500 feet thick. The type section at 'Sunshine' contains fossiliferous sandstone and mudstone with conglomerate and intercalated pyroclastic rocks which yield Potassium/Argon dates from below the mammal horizons of 6.1 and 7.6 million years. A 5.7 million year date higher in the section is associated with the type faunal locality, which has produced an incisor of the earliest known rodent from the Australian region and new representatives of the marsupial families Ma«ropodidae and Diprotodontidae. The fauna also includes gastropods, crocodilians, snakes, birds, and a dasyurid. Fossil vertebrates have been collected from 21 widely scattered localities.
Google map showing geographic bounding box with values North bound -5.0 East bound 145.5 West bound 144.0 South bound -7.0
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Product Type/Sub Type

dataset - GA Publication - Bulletin

Constraints

license
Creative Commons Attribution 3.0 Australia Licence

IP Owner

Commonwealth of Australia (Geoscience Australia)

Author(s)

Date (publication)

1967

Product Type

dataset

Topic Category

geoscientificInformation

Keywords

GA Publication
Bulletin
stratigraphy
Earth Sciences

Resource Language

English

Resource Character Set

utf8

Resource Security Classification

unclassified

Geographic Extent

North bound
-5.0
East bound
145.5
West bound
144.0
South bound
-7.0

Lineage

Unknown

Digital Transfer Options

onLine

DISTRIBUTION Format

pdf

Distributor

Role
distributor
Organisation Name
Geoscience Australia
City
Canberra
Administrative Area
ACT
Postal Code
2601
Country
Australia
Email Address

Metadata File Identifier

a05f7892-fd88-7506-e044-00144fdd4fa6

Metadata Standard Name

ANZLIC Metadata Profile: An Australian/New Zealand Profile of AS/NZS ISO 19115:2005, Geographic information - Metadata

Metadata Standard Version

1.1

Metadata Date Stamp

1996-10-29

METADATA SECURITY CLASSIFICATION

unclassified

Metadata Contact

Role
pointOfContact
Organisation Name
Geoscience Australia
City
Canberra
Administrative Area
ACT
Postal Code
2601
Country
Australia
Email Address
Downloads
For information on acquiring this product,
please contact the Geoscience Australia Sales Centre via:

fax:
+61 2 6249 9960; or
phone:
1800 800 173 (within Australia);
 
+61 2 6249 9966 (outside Australia).

Please note that support hours are 9 am to 5 pm weekdays