Cartoon cross-section of New Zealand stratigraphy.[1] Cenozoic deformation has been removed for clarity.
This is a list of the units into which the rock succession of New Zealand is formally divided. As new geological relationships have been discovered new names have been proposed and others are made obsolete. Not all these changes have been universally adopted. This table is based on the 2014 New Zealand Stratigraphic Lexicon (Litho2014).[1][2] However, obsolete names that are still in use and names postdating the lexicon are included if it aids in understanding.[3]
Names for particular rock units have two parts, a proper name which is almost always a geographic location where the rock is found and a hierarchical rank (e.g. Waitematā Group). This ranking system starts with individual 'beds' of rock which can be grouped into 'members', members are grouped into 'formations', formations into 'subgroups' then 'groups'. In New Zealand, groups are further combined into 'supergroups' or for basement rocks into terranes. Not all of these hierarchical layers are necessarily present within a particular rock succession. Many New Zealand rocks can also have names based on their major rock types, such as the Wooded Peak Limestone or the Hawks Crag Breccia.[4]
^J.J., Kamp, Peter; A., Vincent, Kirsty; J.S., Tayler, Michael (2015). Cenozoic sedimentary and volcanic rocks of New Zealand: A reference volume of lithology, age and paleoenvironments with maps (PMAPs) and database (Report).{{cite report}}: CS1 maint: multiple names: authors list (link)
^Definitions and procedures, section 3
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