User:TaoCo/sandbox

Week 2 Assignment:

The first article is about Plate tectonic in full. The description is detailed with key principles, types, driving forces, development, and so on. Each fact is referenced with an appropriate, reliable reference. The article stays on the topic from different perspectives, and it presents a stand of neutral position. All the facts can be traced through citation page at the bottom of the article. The info are mostly from articles and books.

However, some sub-topic, for instance, implications for biogeography is concluded only by a few sentences. The auther did not go deep on the relations of biogeography and tectonic plate movements. The links are working just fine.

On the talk page, people are commenting about the article regarding to minor wording issues, confusing terms, or lack of evidence and so on.The article was rated as C-class.

The subjects are discussed in a way harder to understand than that of previous ESS class. -----~~~~

Week 4 Assignment:

My assigned article is galapagos microplate. It is now rated as a stub-article, and even though, the citation on the page is very vague. In order to reconstruct the topic into an article, more researches needs to be done.

I am planning to introduce:

1. The background of the microplate in terms of how it is named, and where it is located.

2. The motion pattern and driving forces of the microplate.

3. Influence of the microplate and some geological discover upon the microplate.

I will be mainly using the article from UW library. a few sources are found for now:

1. The recent history of the Galapagos triple junction preserved on the Pacific plate. Tominaga, M., Tivey, M., MacLeod, C., Morris, A., Lissenberg, C., Shillington, D., & Ferrini, V. (2016). Characterization of the in situ magnetic architecture of oceanic crust (Hess Deep) using near‐source vector magnetic data. Journal of Geophysical Research: Solid Earth, 121(6), 4130-4146.
2. Structurl pattern of the Galapagos Microplate and Evolution of the Galapagos Triple Junctions. Structural Pattern of the Galapagos Microplate and Evolution of the Galapagos Triple Junctions. (1988). Journal of Geophysical Research: Solid Earth, 93(B11), 13551-13574.
3. Counter-rotating microplats at the Galapagos triple junction. Klein, Emily M., Smith, Deborah K., Williams, Clare M., & Schouten, Hans. (2005). Counter-rotating microplates at the Galapagos triple junction. Nature, 433(7028), 855.

If your sources end up being too specific, I recommend taking a look at the articles they reference in their introductions. These will likely give more of a broad overview. Erik 03:43, 24 April 2017 (UTC)

This is a start. Reference 2 is missing the authors. I am not sure what your topic 3 means. I think you need to consider the history of the microplate, and its internal structure. the following article might be of interest Hans Schouten, Kim D. Klitgord, David G. Gallo, Edge‐driven microplate kinematics Journal of Geophysical Research: Solid Earth, 10 April 1993, Vol.98(B4), pp.6689-6701. - http://onlinelibrary.wiley.com/doi/10.1029/92JB02749/abstract - The UW libraries should be able to get you to the full thing. If not contact the librarian Have you searched with Georef? William Wilcock (talk) 05:40, 24 April 2017 (UTC) This

Galapagos Microplate

The Galapagos Microplate (GMP) is a geological deformation of the oceanic crust located a few hundred kilometers away from the west coast of South America, at 1°50' N. The GMP initially develops at the Galapagos triple junction, where the Pacific, Cocos, and Nazca Plates meet and form a clockwise-rotating microplate with the confluence of the Cocos-Nazca, Pacific-Cocos, and Pacific-Nazca spreading ridges. The Galapagos triple junction is not an ordinary Ridge-Ridge-Ridge (RRR) triple junction, considering that the westward propagating and slowly diverging Cocos-Nazca Ridge cuts through toward the East Pacific Rise (EPR) and opens up a second microplate of a smaller scale, north of the GMP. Essentially, the Galapagos triple junction consists of the large GMP and a smaller Northern Galapagos Microplate (NGMP). However, the tip of the Cocos-Nazca ridge does not reach the EPR, and is about 50 kilometers from it. Empirically, the GMP is bounded by the EPR, the Dietz Deep Volcanic Ridge, and the slow-spreading Cocos-Nazca ridge. Provided that

History

The history of the Galapagos Microplate can be traced back to 1.4 million years ago, with evidence supported from the southern triple junction trace on the Pacific plate that developed southern boundary of the Galapagos Microplate. The southern boundary of the GMP was then starting to form by an active hot spot located underneath southern tip of the EPR. The hot spot rifted from the Pacific plate to the Nazca plate at approximately 1.2 Ma. Seamounts appear over the hot spot within the Nazca Plate in a fairly short time period. The boundary is now known as Dietz Deep Volcanic Ridge, which propagates towards the northeast direction, at a velocity of 39 mm per year. This propagation led to an uplift of accumulated magma and constructed the Dietz Deep Basin with a high relief in elevation. Seamounts have been active with the occurrence of magmatic eruption, and continue to raise the elevation of Dietz volcanic ridge.

At around 0.8 Ma, magma spread further northeast, along the Dietz volcanic ridge with a moving rate of 33 mm per year. Along with the concurrent earthquakes generated by propagating ridge motion, recent seismic

Structural Pattern

The seafloor bathymetric graph has clearly confirmed an occurrence of internal structural deformation at the location of Galapagos triple junction.

Driving Force

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