Video | Business Headlines | Internet | Science | Scientific Ethics | Technology | Search


Scientists confirm former site of Pink and White Terraces

Scientists confirm former site of Pink and White Terraces

The diary and hand-drawn maps of a nineteenth century geologist has enabled NIWA scientists to confirm the former site of the iconic Pink and White Terraces at Lake Rotomahana.

Geologist Ferdinand von Hochstetter conducted the only known formal survey of Lake Rotomahana before the 1886 eruption of Mt Tarawera which devastated the surrounding countryside, destroyed several villages and was responsible for about 120 deaths.

It was the largest and most destructive volcanic eruption in New Zealand since the arrival of Europeans in the early nineteenth century.

NIWA scientists Dr Andrew Lorrey and John-Mark Woolley have evaluated Hochstetter’s diary notes and reconstructed his survey sites and stations around Lake Rotomahana using LIDAR, or Light Detection and Ranging – a remote sensing system that uses light pulses to measure distance and topography. They combined that information with sketches drawn by Hochstetter and a map published in 1862 to pinpoint the former location of the terraces.

“Our research agrees with previous findings by Professor Ron Keam and GNS Science that the former sites of the terraces are under the modern Lake Rotomahana,” Dr Lorrey said.

The research was undertaken at the request of Tūhourangi Tribal Authority following conflicting findings about the former location of the terraces. The new NIWA results have been published today in scientific journal Frontiers of Earth Science.

The terraces formed over thousands of years as silica-rich water emerging from springs and boiling geysers crystallised into giant tiered staircases. The White Terrace covered more than three hectares while the smaller Pink Terrace was used for bathing on the lower levels. There was also a smaller, lesser known feature called Tuhi’s Spring, or the Black Terrace.
The Terraces were a thriving tourist destination, attracting people from overseas, and described as the eighth wonder of the world.

Dr Lorrey says Hochstetter’s survey bearings and sketches document Lake Rotomahana and the Rotorua landscape and include important details about the terraces, small geothermal features around the lake and some distant landmarks.

“From Hochstetter’s material, supplied to us by Dr Sascha Nolden, we were able to resconstruct where former survey datums were located. We used those details to position the map he published to show the location of the terraces.”

Hochstetter’s notes also contains several other draft maps that Dr Lorrey says were progressively refined as he continued his work.

“You can see how he reconsidered two or three times how to draw things and how to orientate them. The published map is faithful to the diary measurements, and the results we obtained align to previous research on where the terraces might be.”

Dr Lorrey says the outcome also demonstrates the accuracy and utility of historic documents for scientific research.

However, the position of the former Black Terrace remains inconclusive, although it is mostly likely located on land to the northwest of the modern Lake Rotomahana.

As for the fate of all three terraces, Dr Lorrey says this latest research did not cover whether they were still intact.

“There is a lot more science that is yet to be done to see what’s down there.”

Tūhourangi Tribal Authority chairman Alan Skipwith acknowledged the Terraces Research Group that volunteered their time and work to assist ,and the lead provided by NIWA and welcomed their findings.

“We are very pleased to have this information that enables us to better understand where Te Tarata and Otkuapuarangi (Pink and White Terraces) were located and what became of them.”

See paper here:

© Scoop Media

Business Headlines | Sci-Tech Headlines


Grey Power: Is Disappointed To Learn Of More Bank Closures

Many older people are being left without essential services because of cost cutting and the march of modern technology. It is now expected that most banking transactions can occur via the internet or telephone. Jan Pentecost, President of the Grey Power ... More>>


Economy: Supply Chain On Brink Of Overload Says National Road Carriers

The New Zealand supply chain is on the brink of overload and it looks like the upcoming peak imports season may push it over the edge says National Road Carriers Association (NRC) CEO David Aitken. “Worldwide supply chains are in disarray,” says Mr Aitken. ... More>>

Retail: Supermarkets Announced As Government’s Second Market Study

The Government has today launched a market study to ensure New Zealanders are paying a fair price for groceries. More>>


Statistics New Zealand: Retail Sales Recover In The September 2020 Quarter

Retail sales values recorded the largest September quarter rise since the series began in 1995, Stats NZ said today. Spending on major household items, vehicles, and groceries contributed to the strong 7.4 percent ($1.8 billion) rise in total ... More>>

Kea Aerospace: New Zealand Flies Into The Stratosphere

Development has started on a solar-powered, unmanned aircraft that can fly in the stratosphere continuously for months at a time. The zero-emission aircraft will carry a suite of imagery equipment that will be game-changing for many industries, vastly ... More>>

Stats NZ: Births And Deaths: Year Ended September 2020

Births and deaths releases provide statistics on the number of births and deaths registered in New Zealand, and selected fertility and mortality rates. Key facts For the year ended September 2020: 57,753 live births and 32,670 deaths ... More>>


Forest & Bird: Kākāpō Wins Bird Of The Year 2020

The nation has voted and Aotearoa New Zealand has a new Bird of the Year. New Zealand’s moss-colored flightless parrot has climbed to the top-spot for the second time in Forest & Bird’s annual Te Manu Rongonui o Te Tau/Bird of the Year competition. ... More>>