Kermadec, Plates, Kenny Lienhard

The Plate in detail

Kermadec, seed 548

Plate 28 of 52 · one of one

Traits

Palette: Azurite
Structure: Thrust
Event: None
Faults: One
Scale: Standard
Hang: Diagonal
Accent: Repeated
Era: Low seas
Heading: East-northeast, 60.6°
Speed: 3.47 cm a year

History

The past. With the sea about 120 metres lower, about 16,000 square kilometres of today’s shallow seas on the Kermadec plate were dry land, and the eastern North Island had about a third more land. Hawke Bay was dry, and so were the shelves from Mahia to East Cape, along the Wairarapa and in the eastern Bay of Plenty. The land was already dry when the timeline begins; the rising sea drowned most of it between 16,243 and 8,776 years ago. On this coast the ground itself rises and sinks, so the areas are approximate. The lines that stand for the shallow sea turn a quarter of the way to the colour of land, all at once, and only across those spans.

5.5 million years ago: The Havre Trough began to open behind the Kermadec arc.
2 million years ago: The southern end of the arc system, near New Zealand, began to pull apart.

Sources: Lambeck et al. 2014, PNAS 111:15296; Clement et al. 2016, Quaternary Science Reviews 131:73; Berryman 1993, Tectonics 12:1347 · Ruellan et al. 2003, Geochemistry Geophysics Geosystems 4 · Wysoczanski et al. 2019, New Zealand Journal of Geology and Geophysics 62:371

Onchain

The file

94,953bytes, the whole work

74,112bytes of code that draws it

4,883bytes of its record, plain text

0network requests

One HTML file, to be etched to Ethereum in full: the code that draws the work (151,144 bytes before compression), this plate’s settings and its record. Nothing is fetched from anywhere else. It reads your clock and slides the view to where the plate is today.

engine sha256 a7fbc03acc0fc9ba343881bb88ddaf2b7564564d8bc9cbed16e75e47e01fb3f2

The record inside it

The plate: Kermadec, a micro plate in Bird’s PB2002 model: 505,345 km², 90% ocean
Its motion: A pole at 39.52°N 5.48°E turning 2.370° per million years; at its centre 3.5 cm a year, heading east-northeast
What covers it: slope and ridge 53%, deep ocean 26%, ocean trench 6%, grassland 6%, and seven more
Its past: Low seas, between 30,100 and 8,776 years ago, with its account and source
Deep history: Two dated events, the oldest 5.5 million years ago, each with its source
Its outline: 97 points, to a hundredth of a degree
Licence: CC0 1.0, no rights reserved

Read the record

Sources

The plate, its outline and its motionBird, P. (2003). An updated digital model of plate boundaries. Geochemistry, Geophysics, Geosystems 4(3), 1027.
What covers it, which chose the paletteESA CCI Land Cover and Water Bodies, ETOPO 2022, Köppen-Geiger climate maps, NSIDC Sea Ice Index.

Kermadec

Finished