I'm baaaaacccck. Those of you checking in here regularly may have wondered if I was lost at sea. Well, I wasn't but our antenna was having some serious issues as they say. It was dead and hence, no internet and hence no exciting (or lackluster) journal updates from moi. Just as I was about to post my journal on Sunday evening, it went off. So, I'll be posting them all now - lucky you. My journal on the rocks is ready for your perusal....
Rocky is the theme today. The winds are making the boat very rocky. While that may sound like a recipe for seasickness, it is actually my favorite for sleeping. I love sleeping on the boat as it rocks forward and aft, side to side. The original design of the Laurence M. Gould has a flaw so a version of water wings (that's what I call them) were added. I love that rocking so much, I have thought about building an adult sized cradle when I get home to simulate the Gould's rocking.
See the waterwings? I guess they call them stabilizers. They are the protrusions on each side of the ship. A necessity, of course, but it does make for a more rocky ride than the Nathaniel B. Palmer which is the other NSF icebreaker ship down in Antarctica.
You can see a little of the tilt in this picture. I wonder if there is a higher percentage of seasickness on the Gould than the Palmer.
However, the real rocky news is a reference to what we found on the floor of the fjords. They were sharp angled (not eroded) as they slide down from the glaciers into the water. They were also really pretty. I know there are a few geologists reading along so I would love to hear what your thoughts are as well. I took advantage of the fact that we have rockophile, i.e. rock lover (is that really a word?) in our midst to learn a few things about the rocks and pass them on to you. Amy, the marine science tech is our resident pro.
Amy, the Marine Science Tech on the ship, happens to know a lot about marine geology - rocks in the water. She was quite enamored by the rocks that came up in the nets when we were in the fjords. She wants to make a rock garden on the boat. Not so sure that idea will fly, but hey, a girl can dream can't she?
So, the majority of the rocks we found were granite and basalt. People pay good money to have granite counter tops and such. The mineral composition in these rocks reflect the cooling process they went through when being formed. Some of the minerals in these rocks include potassium, feldspar, biotite mica, quartz, calcite, pyroxene, olivine, and plagiodase (that's in the feldspar family, I looked it up). So the two main ways these rocks made it into fjord waters were glacial movements and aeolian impact. Aeolian impact??!! Huh? My thoughts exactly so I looked that up too. That's a fancy, scientific way to say wind impact. Try to use that in a sentence in the next couple days. You'll be very impressive!
Here is a sampling of the rocks. The reddish one is granite. There was quite a bit of that down there.
This beauty has some feldspar mixed in. If you want more detail, send in your questions and I'll hand them over to Amy.
Anyway, these rocks were carved up and deposited into the waters by glacial movement and wind as well. That accounts for their angular shapes. That they are not smooth tells us that they have not been exposed to the ocean currents or transported far within the ocean. Antarctica, as you may now know from the pictures up here, is very mountainous. We found some rocks in the sediment core samples too. So there you have it. Take a gander at this rock sampling we recovered.
Remember the tunicates? There is on on this rock. They anchor themselves on the rocks down there. We found quite a few of them.
Here is a sampling of rocks we found. They are still pretty muddy.
Nice, huh?
Okay, give me a few minutes and I'll get Monday's journal posted as well. We are heading into Palmer station and the internet is up an ready. Lucky you!
Here is Flanders Bay where we recovered the rocks I showed you. These fjords, as I have said, are absolutely gorgeous!