Back and energized by my blog’s newfound respect on Google, I’m a-rearin’ to go!
The rain that was threatening the night before when we all went to sleep stayed away, much to the pleasure to the 1/2 of us that slept outside. Half the group went to sleep in a nearby laundry room in fear of being rained on, and their night was crowded, hot, and filled with bugs (if girly screams from a distance are any indication – which they are). Those of us outside had a nice sky, wonderfully crisp, cool air, plenty of space, and lots of bugs. Or, so I heard. I wasn’t bothered by any.

Saw this little guy at Kata Tjuta. Too cool to not be included.
We had a busy day ahead of us, starting with watching the sunrise over Uluru. I was woken up by an alarm going off next to me, at which point I mumbled hopelessly “Was that your alarm?” knowing full good and well that it was and it was time to get up, dammit! We were off on our way after a quick breakfast to head to the same place from which we watched the sunset the night before. It was nice, but not as cool as the sunset was, as the rock wasn’t illuminated in the same brilliant red fashion.

Still pretty damn cool though.
What was more important about getting up early was to beat the Sun for our hike on Kata Tjuta. Unlike Uluru, where people are only allowed to walk around the base (not counting the ridiculous exception for its one climbing path), there is a hiking path through, and in some parts, on Kata Tjuta. Kata Tjuta consists of 36 separate domes, and at its peak, is slightly taller than Uluru is.

David photobombs Kata Tjuta
It was roughly a 5k hike, but it was nice and early in the morning, so it wasn’t hot at all (until the end of the walk, when it was starting to get warm). For the first 1/3 of the walk we all stayed together Dan guiding us along a little bit, before turning us loose on the trail. Before doing so, however, he discussed the geological history of the area. Yes! Though not the most technical discussion in the world, it seemed like a good explanation, even though he had to cater it a bit to the non-native English speakers of the group – about 1/2 of us. So, (with help from Wikipedia) I’ve touched it up a bit for our next…
Geological Aside!!!! (Read it this time, punkfooligans!)
Like the vast majority of the rocks in Australia, Kata Tjuta and Uluru are sedimentary in origin. In fact, the formation of the two are very similar, dating to about 530-550 million years ago. At this time mountain ranges to the southwest were being uplifted rapidly, an event known as the Petermann Orogeny. Rivers carried weathered material away, depositing it in alluvial fans. Storm events would cause flooding, and the resulting high energy environment would carry the igneous stones downslope. In fact, there is evidence of depositional features like ripples in the rock, which indicate a high energy, fluvial (river) or marine environment (in this case, fluvial).
Though deposited in separate alluvial fans, the two formations have similar origins. While there are slight variations in the rock types, they are generally similar. The rocks are conglomerates, meaning that they are generally large clasts that are cemented together with a fine-grained matrix. In the case of Uluru and Kata Tjuta, the clasts are predominantly made of feldspar, and the matrix is mostly quartz sandstone. The generally rounder and smaller grains at Uluru indicate they they were transported farther.
Finally, 300-400 million years ago, the rocks were tilted on their sides. Thus, the beds that make up the many thin layers in the rock are now vertical. Another indication of the pressures the rocks were under is the presence of epidote, a metamorphic mineral that forms are relatively low pressures and temperatures.
The rocks’ red appearance is due to weathering. In actuality they are a light grey, but any exposed surface is quickly (at least on geological timescales) oxidized and turns red due to the rust. Also, where there are channels eroded into the rock, the surface is black due to algal growth. Lastly, because the rocks in Uluru and Kata Tjuta are so homogeneous, they have be fairly resistant to erosion, allowing the formations to survive for hundreds of millions of years.
I found it funny on the trip how, as a geology major, I was viewed as some sort of geological expert. While I (think I) know more than most folks without any real geological background, I didn’t really know the specifics of the places we went to. However, Dan seemed to always double check what he said with me, and I found his explanations to be pretty good in general.
In any case, we all moved on with the hike, and while I started out near the front of the pack, I stopped often to take pictures and quickly fell to the back of the pack. I had trouble believing that so many people just marched right along through such amazing scenery without taking tons of pictures. What was really great to see were the occasional small creeks and puddles that had formed because of the recent rainfall. (I was actually hoping it that it rained on us so we could get to see water streaming down the sides of Uluru. But, I guess the lack of rain was good, at least for the health of my camera.) Still, it was cool to be able to see signs of fluvial erosional processes in the puddles and creeks at Kata Tjuta. Yeah, I said it!

A pothole! Evidence of abrasion!
Brief Geological Aside:
The little underwater hole in the rock pictured above is called a pothole. It was maybe a foot across and a foot deep (I should’ve included something for scale, clearly). They are formed by a process called abrasion. Small particles being carried in a stream can chip away small bits of the bedrock, forming tiny holes. These get enlarged when eddies form due to the holes, cause water, and the sediment suspended in it to spiral around. The suspended sediment abrades away more rock, making the hole bigger. Eventually, this process gores out a hole like the one above.
Phew! That was yet another fun Geological Aside!
After pausing for an incredibly nerdy time at all the little creeks I saw, I had fallen to the back of the pack with a few of the other folks smart enough to take their sweet dear time. We did briefly catch up with the sprinters where they had paused up ahead for a truly awesome photo op. I managed to sneak in with the Adelaide Uni group just in time. That would be on someone else’s camera, however. Here’s a picture without any of us schmucks in it:

The view from the apex of the hiking trail on Kata Tjuta.
Everyone else marched along while me and three others, a German dude named Steffen, and two Dutch girls name Caroline and Irma, moseyed our way down the trail. Taking our time –and lots of pictures, it was a really fun, scenic hike. The only problem with taking so long is that it did start to get pretty hot by the end of the walk. When we finally caught up to the rest of the group already waiting for us at the bus, we were quite a bit sweatier than they were. But, we were still right on schedule! (But only by a couple of minutes.) So, upon our triumphant return, we all loaded up on the bus and headed back to camp for a quick lunch before the Uluru Base Walk…

The Stragglers, from left to right: Irma, me, Caroline, Steffen