Contacts

Identifiers and Keywords

ANZLIC Id

ANZVI0803005011 

Jurisdiction

Victoria 

Topic category

• Inland waters
• Geoscientific information

Resource Constraints

Use limitation

General 

Classification

Unclassified  

Creative Commons Attribution 4.0 (CC-BY)

• 
• License Text

Other Dataset Details

Date ( Revision )

2013-07-04

Status

Completed  

Format

DIGITAL: ESRI ASCII GRID 3 

Supplemental Information

Related Documents: None 

Maintenance and update frequency

As needed  

Spatial

Spatial representation type

Grid  

Description

General - Victoria 

Reference system identifier

4283

N

S

E

W

Temporal

Begin date

2011-06-30 

End date

2012-06-30 

Quality

Conceptual Consistency

Not known 

Missing Data

Victoria 

Attribute Quality

Not known 

Positional Accuracy

Not known 

Lineage

Statement

Dataset Source: Seismic horizon 'phantoming' and gridding methods (using Surfer10) estimates for the Top, Base and Thickness of the Wangerrip Group were estimated. An assumption was made that faulting in the Top Dilwyn represented Top and Base Wangerrip Group faulting. Regional seismic mapping verifies this assumption. The corrections were made by tying the Top Dilwyn horizon (with faults) generated by 3D Geo to Department of Environment and Primary Industries (DEPI) supplied stratigraphic formation tops for the Top Wangerrip (generally Top Dilwyn) and the Base Wangerrip (typically late Cretaceous Top Sherbrook Group). Account was made of outcropping Wangerrip Group (typically Pebble Point units- Dilwyn was absent) on the western side of the Otway Ranges, where top Wangerrip Group was fixed to the topographic surface. The Base of the Wangerrip was connected to bedrock elevation data from bores to the north of the basin. This horizon correction exercise showed the variability (documented in the DEPI data) of interpreted horizon tops between various basin study workers and groundwater mappers over the years, depending on the stratigraphic (biodata, lithological, seismic or geophysical log) and basin study approaches at the time of the work. The DEPI formation tops were averaged with any large outliers left out. The Mepunga Formation was not mapped as part of this exercise. It is not as widespread as the Wangerrip group units and it would be speculative to force a Top Dilwyn surface to fit to a Top Dilwyn/Mepunga surface. As the Mepunga Formation is not considered, the LTA aquifer could be up to 100m thicker locally. Dataset Originality: Derived 

About the Metadata Record

Metadata identifier

urn:uuid / 471f69e5-9097-5c4f-b293-17b3c02078e1