Description: This item displays Tertiary Formations in the Taranaki Region. Aquifer bearing formations can be generally characterized into those of Quaternary (-> younger) and Tertiary (-> older) age. Tertiary formations, spanning the time period from 65 to 2.6 million years ago, are significant groundwater sources. 

Nine Tertiary sedimentary formations are recognized in the Taranaki Region. They are informally named after the geological units they occur in. The formations as a whole are gently tilted towards the southwest. Seven formations are exposed in the eastern Taranaki hill country and continue beneath the volcanic and marine terrace deposits, while two (Otunui and Mt. Messenger) are fully exposed. 

More information can be found here.

Date :

• +First published: April 2025
• +Data Captured: N/A
• +Last Updated: April 2025

Creator: Taranaki Regional Council (TRC)

Publisher: TRC

Subject: Tertiary Formations

Purpose: To be utilized within Web Maps on Local Maps.

Language: English

Format: Feature Layer (hosted)

Type: Vector (Polygon)

Coverage: Top (Latitude) -38.696589, Bottom (Latitude) -39.877197, Left (Longitude) 173.698632, Right (Longitude) 175.012980

Full Extent

• XMin: 1664881
• YMin: 5586377
• XMax: 1759659
• YMax: 5702082
• Spatial Reference: 2193 (2193)

Spatial Coverage: Taranaki Region, New Zealand

Projection: New Zealand Transverse Mercator 2000 (NZTM2000)

Fields:

• OBJECTID ( type: esriFieldTypeOID, alias: OBJECTID)
• TA ( type: esriFieldTypeString, alias: TA ) - Name of formation
• Shape ( type: esriFieldTypeGeometry, alias: Shape )

Identifier: b7409becce91441d8a034f7f6d9891f2

Version Control: None. Users should take note of the date on which they downloaded the data.