User talk:DGShanks/sandbox

TA Feedback
4/3 Assignment - Uh oh! Doesn't look like you were taking notes on your readings in your sandbox! Be sure to do this for other assignments! (-2 points) Nice work getting your trainings done on time though! EKM2018 (talk) 17:57, 9 April 2018 (UTC) 4/7 Assignment - Looks like you've done your trainings but haven't done the actual assignment! (-2 points) If you get this done by tomorrow (4/10) I will restore your score! EKM2018 (talk) 18:01, 9 April 2018 (UTC) 4/10 Assignment - Looks like you need to do this assignment! Do ASAP for partial credit (-5 points) - get in touch for help brainstorming or if you have questions! EKM2018 (talk) 17:39, 17 April 2018 (UTC) Thank you for posting your topic but you need to do some outlining on your sandbox about what you think you will need to add, thoughts on sources, etc. (-3 points, final score) EKM2018 (talk) 20:14, 22 April 2018 (UTC) 4/21 Assignment - Nice looking sources! However, let's see if we can find some some non-journal articles. From the work you have done already you can start to see where you need sources... I think not just providing the topic but a key fact and how each source will fit into your outline will help with this. https://antarctic-plate-tectonics.weebly.com/shetland-plate.html provides some good information condensed onto a site that could give you other sources! Also you should post your bibliography on the talk page of the topic so that you can get feedback there! Oops looks like Will cited that same website! EKM2018 (talk) 05:46, 30 April 2018 (UTC) 4/28 Assignment - You are doing a good job expanding your sections, but try to do so in a way that you can stay organized - I think expanding what each source is giving you will help. Also start thinking about what figures you might want to add! EKM2018 (talk) 05:46, 30 April 2018 (UTC) 5/2 Presentation Feedback - Can you compare its size to a known country or state for the general audience? I would change "Tectonic Settings" to "Tectonic Setting" (no s) for confusion. I think you mean "Volcanism" not "Vulcanism." Did the website you mention cite sources? These could be helpful, and honesty since that website cited their sources, it could be potentially be used as well. Is the plate ultimately getting bigger or smaller (subduction on one side, spreading ridge on the other)? Along these lines, I'd love to know more about the history, timeline, and ultimate fate of the plate. Is it subducting or experiencing roll back or what? EKM2018 (talk) 16:22, 3 May 2018 (UTC) 5/5 Assignment - First Draft Notes - It would be nice if you could expand each of the tectonic settings sub sections a little. Are there any specific papers that explore features within these settings? Can you further characterize them, describe any more features? For example, how deep is the basin? Are there any uniques sediments infilling it? You could elaborate and use at least a little more info from the already established page. Any other unique features characterizing the fracture zones? Why does a fracture zone form? It's not a typical, major plate boundary type, maybe mention or expand on that (definitely link the fracture zone page). I would rephrase the Geologic History a little bit for clarity "Prior to 3 Million years ago the Phoenix plate was actively subducting under the Antarctic Peninsula while simultaneously being formed at the Phoenix spreading ridge. At approximately 3 Ma the Phoenix spreading ridge halted. As a result of the cessation of spreading the Phoenix Plate became welded to the Antarctic Plate and the Shetland Plate began to form..." (to what direction of this welding, why? I'm not quite sure I understand what you are describing - why would it accrete to the Antarctic plate due to spreading ending? Do you mean subduction ended? I think Will's notes on this section will also help you think about this a little more, because apparently from his note spreading isn't actually going on)... Why does calc-alkaline nature suggest volcanism from Cenozoic to Tertiary time? Explain this. When you say most recent, do you also mean on-going? Is it still active? What size were the earthquakes? Nice beginning overall, just needs to be expanded! EKM2018 (talk) 17:14, 10 May 2018 (UTC) 5/26 Assignment - Second Draft Notes - I edited your sandbox because there wa more there than the main page. I bolded the words and stuff that I changed - you can unbold when you accept or make changes. I put in several comments for the tectonic setting and volcanism and earthquake sections to make it a little more detailed and clear. This is really well done - very concise and well written. I think you are very close to being done just need to add a little more and definitely add a figure! And of course move it all to the main page! Big take aways are that I think you can find a way to add a new figure, potentially using the volcanism section? Or even the earthquake section to show where earthquakes are located? You can add more to increase the length and depth of your page by adding in the specifics about these earthquakes, double checking you've found all you can using the USGS earthquake search catalog! https://earthquake.usgs.gov/earthquakes/search/ Super handy and could be used for making a figure? Good work and you are really close! EKM2018 (talk) 16:34, 29 May 2018 (UTC)

Sources Feedback
This is good topic and one that I am particularly interested in that I have worked before at Deception Island volcano in Bransfield Strait and may return there next winter for another seismic experiment. You have found some good sources but at present your listing the topic they cover rather than a key fact or point from the article that you plan to cite. I like the fact that you have an outline. Wikipedia articles start with a general paragraph introducing the topic. I think tectonic setting is a key section but I am not sure you need subsections on the Antarctic and Scotia plates - they already have wikipedia articles. Separate sections on subduction at the trench and extension in Bransfield basin would work but there is also a wikipedia article on bransfield basin which is quite extensive. Origin and Geological History, Earthquakes and volcanism are good sections. Not sure about a section on plate motions since I think that is part of the tectonic setting.

There are some good wikipedia articles already that you can cite https://en.wikipedia.org/wiki/Geology_of_the_Antarctic_Peninsula (see last section)

You are going to have to also introduce the now defunct Phoenix plate which was caused by spreading at a ridge to the north that led to subduction beneath the Antarctic peninsula. Subduction has now ceased but the slab continues to roll back extending the crust in Bransfield Basin.

Some other good sources González-Casado, J. M., Robles, J. L. G., & López-Martínez, J. (2000). Bransfield Basin, Antarctic Peninsula: not a normal backarc basin. Geology, 28(11), 1043-1046. Lawver, L. A., Sloan, B. J., Barker, D. H., Ghidella, M., Von Herzen, R. P., Keller, R. A., ... & Chin, C. S. (1996). Distributed, active extension in Bransfield Basin, Antarctic Peninsula: evidence from multibeam bathymetry. GSA Today, 6(11), 1-6. Pelayo, A. M., & Wiens, D. A. (1989). Seismotectonics and relative plate motions in the Scotia Sea region. Journal of Geophysical Research: Solid Earth, 94(B6), 7293-7320. Barker, D. H., Christeson, G. L., Austin Jr, J. A., & Dalziel, I. W. (2003). Backarc basin evolution and cordilleran orogenesis: insights from new ocean-bottom seismograph refraction profiling in Bransfield Strait, Antarctica. Geology, 31(2), 107-110.

A non wikipedia general articles https://antarctic-plate-tectonics.weebly.com/shetland-plate.html William Wilcock (talk) 21:17, 27 April 2018 (UTC)

Instructor Feedback 5/8/18
With the contents menu and all your material, your sandbox is getting a bit cluttered. You might want to create a new sandbox page just for draft article - see https://en.wikipedia.org/wiki/Wikipedia:About_the_Sandbox

This is on the way to being a really good article - you have really nailed the organization. I had previously suggested some additional references (see above on talk page), and I think starting to include some of those will improve it further. It is good to have >1 citation per section

Some specific comments:

Lead Paragraph - I think this should make it clear that subduction is now very close. Also the southeastern border is a rift not a spreading center - there have been a lot of studies trying to determine if it (1) has become or (2) is becoming a backarc spreading center and the answer to (1) is no and (2) disagreement.

South Shetland Trench - I think the only reason there is a trench is that the Phoenix plate used to be spreading. Look at the Pelayo and Wiens paper. What do they say about the current rate of subduction.

Bransfield basin - this topic has a good page of its own but I think you need to expand yours a little

Geological History - again you are using the term spreading center. It is interesting that there was no extension of Bransfield basin while the phoenix plate was subducting. Does anybody suggest why. Perhaps with faster subduction there was no slab rollback to drive extension.

Vulcanism is fine but the alternative Volcanism is more common. In this section and the Earthquake section I think you can add a bit more detail by getting additional sources.

What figures are you going to include?

William Wilcock (talk) 05:00, 9 May 2018 (UTC)

Seiji34 Feedback
Made a couple c/e changes. Sorry, hope you don't mind.

Overall, your draft is well organized, well cited, and concisely written. It's clear that the essential information is there and most sections are nicely linked to pages where other information should reasonably be put. That said, there are a couple of places where a little extra information from those other pages would contribute significantly to the flow of the article and a casual reader's comprehension: In the lead, it might be helpful to mention which plate is subducting at the NW border. Similarly, this would be a good place to quickly introduce the Pheonix plate and its relationship to the Shetland plate (relative position, maybe a quick timeline) before it comes up in the Tectonic Setting section. As EKM2018 mentioned, the section of geologic history dealing with the Pheonix plate is a little confusing. It's not immediately obvious why the cessation of spreading would lead to the welding of the Pheonix and Antarctic plates or the formation of the Shetland plate. The information is there afterwards, but it would read better to either condense all the material in the fourth and fifth sentences into the third sentence or leave off the part about the Shetland Plate in the third sentence and only address it in the fourth and fifth sentences. In the Vulcanism section, it might help to give a little context to the calc-alkaline plutons and more recent transitional basalts, since the vast majority of people won't know what that means or why it might be significant. I also found a couple of things that could be linked to other pages: The Fracture Zone page in the Tectonic Setting: Hero Fracture Zone section The mid-ocean ridge basalts page instead of the Mid-ocean Ridge page in the Vulcanism section, since MOR's are already linked in the lead and it would help give context to the transitional magma types

--Seiji34 (talk) 02:43, 18 May 2018 (UTC)

Kenny's Peer Review
Overall, your page is well written and I think you did a good job on separating your information into your headers. Adding in information such as the size of the plate, how it was formed, its relation to the Antarctic plate, etc., will all help solidify your page. You have a pretty good list of citations so far that are properly cited and reliable.

Lead Header Tectonic Setting Geologic History Volcanism Earthquakes
 * Your leading paragraph is well written and you do a good job at explaining the location and boundaries of the Shetland plate.
 * Maybe add the approximate area or width of the plate (if known). I found this site https://antarctic-plate-tectonics.weebly.com/shetland-plate.html that may help with this, but it is a weebly article so I don't know how credible it is.
 * You can link the list of tectonic plates to your page and classify it as a microplate as the Shetland plate is listed as one on the page. https://en.wikipedia.org/wiki/List_of_tectonic_plates
 * Good job on your summary of the South Shetland Trench and how it correlates with the plate.
 * Adding on to the other tectonic settings would help strengthen this section.
 * You do a good job explaining the change in the spreading rate, but try to add actual numbers of the current spreading rate and past spreading rates if possible.
 * If possible, maybe explaining the different types of volcanism that happen along the plate here could strengthen this section.
 * You could explain the basic processes and formations from each of the time periods you stated if you needed any ideas to add more to this section.
 * If possible, state any significant or recent sesimic activity that has occured here? http://sciencythoughts.blogspot.com/2012/01/series-of-earthquakes-in-south-shetland.html Again, here is a website that may be useful, but it is another blog that may not be too credible. https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/97GL00314 This one might be better to check out. — Preceding unsigned comment added by KAlder10 (talk • contribs) 03:56, 20 May 2018 (UTC)