New Zealand: Queenstown and Aoraki/Mt. Cook National Park

Travel Dates: 4-14 December 2013

Right, so continuing on this trend of finally writing backed-up blog posts, this one's a monster simply because of the photos I had to reorganise to get here! Last December, though, I had the great pleasure of being able to tag along and help teach a glacial geology and geomorphology field trip to the central region of New Zealand's South Island. Having been to the North Island and having experienced the northern- and western-most points of the North Island and explored the watery wonderland of the Bay of Islands, I was totally pumped to get to some of the more staggering New Zealand scenery we all know from Lord of the Rings!

After three hours of one of the most turbulent flights I'd been on in a while (and I'd just return to Sydney from a trip to Denver and Vermont), we landed in Queenstown, the adventure capital of New Zealand. The flight in over the Southern Alps was beautiful. Being early December, New Zealand was just emerging from winter and all of the mountains still had substantial snow on them! We wasted no time in picking up our three passenger buses and trailer, and with 24 student in tow, set right off out of Queenstown to the Kawarau Bridge, famous for being the original bungee jump in New Zealand. Of course, we were there to learn about New Zealand's past glacial geology, climate, and geomorphology - or how the landscapes develop and change through time. Along the first few days the students would be presenting small mini-reports on different aspects of these topics and we weren't letting any second go to waste!

After learning about New Zealand's loess deposits, accumulations of wind-blown dust that were deposited under colder dryer conditions during the last glacial period, we headed off the main highway, taking the Crown Range Road to Wanaka where we'd spend the first night. We stayed at a small hostel/motor park near the shores of Lake Wanaka, which fills one of the many glacially-sculpted valleys east of the Southern Alps, including Lakes Wakatipu, Ohau, Pukaki, and Tekapo. Early the next morning, I got up early for a short walk along the lake, looking out across to the beautiful Mt. Alta rising across the shores. Our destination by the end of the day was Mt. Cook Village in Aoraki/Mt. Cook National Park, but we had plenty of stops to make before calling it a day.

Purple lupin growing at the Clay Cliffs near Omarama

We took Lindi's Pass toward Omarama before doubling back across the Ahuriri River to the Clay Cliffs, a geological formation of very soft rocks exposed along the active Osler Fault. The cliffs are a deeply dissected feature that is the site of an ongoing battle between the uplifting tectonic fault and erosion. We stayed here for a short while and had lunch along the Ahuriri River, a beautiful place to dip your feet in the refreshing water and have a bite to eat. We made one more stop to the former river outlet of Lake Pukaki before it was dammed and diverted but also had time to stop at the southern end of Lake Pukaki to get a sense of what we were in for for the next few days.

Aoraki/Mt. Cook (3,724 m/12,218 ft) looming over Lake Pukaki

The weather was bright and sunny and fairly few clouds against a blue sky, and from here, far off in the distance, was the brilliantly majestic peak of Aoraki (or Mt. Cook), the highest point in New Zealand at 3,724 meters (12,218 ft) above sea level! We had to stop here because the view was simply breathtaking, and because Aoraki is apparently often shrouded in clouds, we thought this might be our only chance to see its entire height! And I should mention Lake Pukaki because it was amazing in its own way. There is so much powdered rock, crushed by glacial erosion that gets washed into the lake that it takes on a very milky appearance which reflects the sky on a sunny day, turning it a turquoise colour that is really only best matched by a Crayola crayon of the same colour!

It was windy, so we got back into the vans and started the fairly long drive down the Mt. Cook Road toward Mt. Cook Village, the views along which were absolutely stunning. I'm jealous of the students in my van because they got to stare out the windows the entire time, while I had to keep my eyes on the road. But if you want a fun road to drive along, this is one of them. It just rolls and wraps its way long the lake and the ever-impressive Southern Alps just keep looming in the distance! Well, if the drive wasn't thrilling enough, once you're past the head of the lake, you begin driving through the wide and flat river valley that drains the Mueller, Tasman, and Hooker Lakes which are all fed by glaciers. And while you can't see the glaciers, as they are hidden by huge glacial moraines and tucked away around the mountains, you do see the incredible wall of ICE that is known as the Huddleston Glacier, which frankly, I thought was one of the most impressive things I've ever seen! It's just this massive, steep wall of ice that you just couldn't stop looking at!

Looking down to the Mt. Cook Village from the Red Tarns. The Huddleston Glacier is the big wall of ice plastered
on the side of the Southern Alps in the distance. Mueller Lake and its end moraine seen in the bottom of the valley.

Aoraki (the Maori name for Mt. Cook) features prominently in Maori history. The Maori people believed the South Island to be a canoe that Aoraki and his brothers were using to voyage the world. It tipped and the brothers climbed onto the top of the overturned canoe and turned to stone. Geologically, Mt. Cook is positioned in the Southern Alps which are the result of convergence along the Alpine Fault which is the boundary between the Indo-Australian tectonic plate and the Pacific plate. The fault is mostly a dexteral strike-slip fault, but there is oblique convergence which has uplifted the mountains on the South Island. It is the Alpine Fault that causes most of the earthquakes in New Zealand, and also as it cuts across the north part of the South Island it goes offshore east of the North Island where subduction of the Pacific plate under the Indo-Australian plate results in the volcanism the North Island is famed for!

Well, while all of the students were excited to get out of the vans and start eating and drinking for the night, I had picked up a wee trail map and having heard that weather is rarely clear in the park, I thought I'd take advantage of it by doing a short hike up to the Red Tarns, some small ponds perched high up the mountains above Mt. Cook Village. Luckily summer in the Southern Hemisphere means plenty of light late into the evening, so I didn't have much to worry about - other than breaking my ankle with no one around! Well, the hike up was unrelentlessly steep, but I eventually made it to the tarns, which in and of themselves aren't that impressive, but you don't make that kind of hike to look at a pond, but for the view of the rest of the valley. Up here, you're so high up above the valley that you can see up and over Mt. Wakefield to Mt. Cook as well as up the Tasman River valley to The Armchair and Malcher Peak. The weather was holding up, so I decided to climb even higher to the shoulder of Sebastopol, the lowest peak in the National Park. Catching my breath, I decided my hunger would win over my want to reach the summit, so I raced down a big scree slope and headed back to dinner at the Mt. Cook Village.

The Huddleston Glacier and Mt. Sefton (left), Aoraki/Mt. Cook (right), and the Mueller
Glacier's end massive end-moraine (centre-bottom)

Weather was clear the next morning again, blue skies and few clouds, so I walked up toward The Hermitage - the famously fancy resort hotel in the National Park that looks directly over to Mt. Cook - for a few morning photos before joining back up with the students. We drove up to the Mueller Glacier overlook for a few more student talks. During one of the talks, we all of a sudden heard this huge crack that sounded like thunder, followed by a cascade of booms and crashes. It was so startling that everyone turned their heads to the glaciers behind us. Though we couldn't see anything, it was pretty obvious we'd just heard a massive block of ice break off the Huddleston Glacier, falling down onto the Mueller Glacier below. Coincidentally, the student giving his report was just talking about ice falls. Talk about timing!

Icebergs from the Hooker Glacier floating in Hooker Lake

Once the student talks were done, we started the long hike up to Hooker Lake and the Hooker Glacier that sits right at the base of Mt. Cook. We continued to hear booms of breaking ice behind us during the hour-long walk up to Hooker Lake, which was cool, but the weather turned, which was not. We could see the clouds rising up from the west and flowing over the mountain tops to our left as the wind picked up and threatened to rain us in. But, being geologists, we go out in anything and this certainly didn't stop us and the last few students presented their mini-reports. You couldn't really see the mountain peaks by this point, but you could still get great views over Hooker Lake which was just chockers full of icebergs in various stages of melting, all shapes and sizes! By the time we left Hooker Lake, the weather had cleared up once again, permitting us to drive around to the next valley over to the Tasman Glacier and Lake.

Lake Tasman is a recent feature to the landscape, having only formed in the last 40 years after the Tasman Glacier (left)
retreated to its current position!

Lake Tasman is impressive, if not for its size (7 kilometres long!), for the fact that 40 years ago, it was not there! Forty years ago the Tasman Glacier's terminus was at the lookout most visitors take the short walk up to from the car park. Now, however, Tasman Glacier ends in the lake and icebergs calve off its front. Though the retreat is impressive and offers the opportunity to take speed boat tours around the lake, it just means our changing climate is killing off these magnificent glaciers!

We headed back out of Aoraki/Mt. Cook National Park toward the town of Twizel where we'd be based for the remainder of the trip. Over the next 5-6 days, the students would be working on small group projects in the area, and we, the trip leaders, would drive them wherever they needed to go. But first, we had another stop to get to up beyond Lake Ohau on the other side of Twizel. By the time we got beyond the shores of Lake Ohau, the weather came back with a vengeance.

The next day was fairly uneventful. The rough weather had cleared up and the students used the day to plan their projects. Twizel itself is a pretty dull town. It was founded as a working camp during the construction of the dams that were built on Lake Ohau, but remained a popular stopover point for travelers going to Mt. Cook (not to mention cheaper than staying in Aoraki/Mt. Cook National Park. While there are some nice coffee shops and cafes in the main shopping area, there isn't much to speak of - especially of the locals. While eating dinner at the Power Station Bistro I noticed one man down his beer outside and promptly walk to a short brick wall and urinate on it! Welcome to Twizel, indeed!

I played chauffer for students heading up back into Aoraki/Mt. Cook National Park over the next three days to collect data for their projects. Depending on which group was where, and when they needed to get to their next stops, I often had anywhere from an hour to a few hours by myself before I had to meet any of the students and move them. This was nice because it gave me time to do a few shorter walks and explore the park a bit more. One of the days I walked up the Mueller Glacier trail to see the head of the glacier which had retreated around the corner of its valley, out of sight from the main view point. Right at the bottom of the Huddleston Glacier. No one else was up this far and I enjoy sitting in the sun in the middle of this amazing landscape. I felt so fortunate to be able to experience it in all its sun-shiny glory!

Suspension footbridge over the Hooker River. Aoraki/Mt. Cook shrouded in clouds

I also joined a few student groups on their quests to collect field data. This varied from walking up along the crest of the lateral moraine along the edge of Tasman Lake looking for students who had gotten well-ahead of me, helping students measure boulder dimensions in streams coming down from creeks draining the steep valleys to the west of Mt. Cook Village, and taking one more walk up to the iceberg choked Hooker Lake.

I had no plans to see any more of the South Island on this trip, and though I was a bit let down about not being able to do that before arriving, I don't think I could have asked for a more amazing experience that just being able to wander and explore the Hooker and Tasman Valleys in Aoraki/Mt. Cook National Park. It really must be one of the most spectacular landscapes I've been to. It's drastic, but accessible; staggeringly expansive, but easy to get around; busy with tourists, but big enough that you don't have to go far to get away from them!

Pianist playing his own music during a beautiful Queenstown sunset
over Lake Wakatipu

The students had a final day in Twizel to write up and hand in their reports, so the last day near the mountains wasn't all that exciting. Finally, we were ready to leave Twizel and made the long drive back to Queenstown for our last night in New Zealand. We arrived early afternoon and many of us had previously signed up to go whitewater rafting to celebrate the end of a long week. We dropped our things off at the hostel and met down in the town at Queenstown Rafting where we were fitted up with wetsuits and packed into large vans with a trailer packed with rafts in tow behind us. This is no big deal, except to get to the launch site, we had to drive down Skippers Road, a long, very tightly-winding road that is cut into the side of mountains with very steep slopes! To put it in perspective, if you sat next to the window, you couldn't see the edge of the road and it looked like there was nothing beneath the van! In fact in one or two places, there almost wasn't anything beneath the van... One tight turn has been so abused that the edge of the road has eroded to the point that side of the van on the inside of the road gets scratched by the rocks sticking out of the slope! At another point on Skippers Road, the road appears to be intact, but when you look back up at it from the river, you see that a big chunk of rock, that would otherwise support the road, has simply fallen away! If you're afraid of this kind of driving, there's no hope for you because no matter which side of the van you sit on, you're going to be exposed to one of these hazards!!!

But the rafting itself was awesome! I've only been whitewater rafting once before on the New River in West Virginia where the water levels that year were low enough that the big rapids had diminished many of the rapids, so I wasn't sure what to expect. Well, the Shotover River is pretty much a narrow, narrow canyon with rocky cliffs on either side and in most places the river is as wide as the raft! I've got to give it to the raft guides because they have some of the hardest jobs in the world in keeping us all safe! While we didn't flip, like we did on the New River, there were so many times I thought we were goners! Two girls did fall out at one point, but we safely got them back on the raft just before they were pinned between the rocks and raft! The trip culminates a tunnel that was blasted into the mountianside to funnel water for gold mining in the mid-1800s, the final rapid is shooting down the mill run right where every raft in front of us was waiting and watching, hoping someone would flip. We didn't, but had a great time and it was an awesomely adventurous way to end a week in New Zealand!

That night was spent out in Queenstown watching a beautiful sunset over Lake Wakatipu and eventually some mechanical bull-riding in one of the town's innumerable options of Western/Cowboy-themed bars. Flights back to Sydney the next afternoon gave me a little bit of time to walk around the local Saturday markets along the lakeshore in what ended up being a very nice sunny relaxing way to end my last visit to New Zealand in a long time! Definitely not the last, but a long time at least!