[TA] 2018 Geological Surveying (Ⅳ) @ Taimali

Taimali (太麻里) is in the southern eastern Taiwan. For the tourists, except for the stunning coastline, the most famous thing will be the orange day-lily (Hemerocallis fulva, 金針花) in JinZhenShan (JinZhen means orange day-lily and Shan means mountain in Mandarin). Geologically speaking, the strata here is the Miocene Lushan Formation. The lithology is mainly composed by argillite, slate and meta-sandstone. The oblique collision of the Phillipine Sea Plate and Eurasian Plate which caused very complex geological structures in this area.

Cover photo : I collected some woods to make a bench on the beach in Taimali, Taitung, Southern eastern Taiwan. The students were sketching the recumbent fold outcrop which we called “Swiss roll”.

( Video in the end of the post )

The purpose of the course is to train the students to observe, sketch the regional geological structures. A 1:1000 geological profile and several mesoscopic sketch are required in the work report every night. The schedule of each day is basically like the following description :

  • Wake up around 4 a.m. and leave the hotel at 5.
  • We reach the coastline at 5:30 and walk around 30 to 1 hour to the outcrop which depends on which section is specified by professors.
  • Start to observe and sketch the outcrops until 13:00 and prepare to go back to the town.
  • Having the lunch and prepare the meeting at 20:00
  • The meeting is often dismissed at 22:00
  • Sleep and get ready for the tomorrow.

This is the third time I have attended this course. The first time was when I was the sophomore. I mainly worked on section B to D (from north to south). Three years later, the second time was last year I was assigned to the special training group which sketched the more difficult outcrops in E section. I could realize that I was able to observe more details on the outcrops after more field trip experiences. The third time is this year and I am the TA of Group I. 

We had five sophomore students in my group. CongHan just behaved like the group leader. He told others to observe, sketch and take photos to the outcrops. YanDe was the attitude hunter. He measured over five hundred attitudes of the surfaces or lineations. He could also climb to the place where others could not easily reached. YuXuan did the mesoscopic sketches of the outcrops and sometimes helps YanDe to measure the attitude of the structures. She also brought a speaker to the field and provided great music while working. BoYuan was the photographer who brought a professional class DSLR and gave high quality photos in the presentations. HeYa was very good at mesoscopic sketching, but she drew the 1:1000 profile map this time. She often stood far from the outcrops to get a large scale trends of the area. They worked smoothly with each other so I could barely  attend their discussion. I just gave some hint or what they should notice to.

By the way, I brought a small drone to the field. It gave us the chance to check the details on the top of the cliff which we couldn’t see in the past. Some broken lineations which were cause by the topography were actually continuous with the bird view. I also chose some representative outcrops to make 3D model using the knowledge I learned from the last field trip.

In conclusion, I think that I have different gains from this course. The first time was training the ability of observing and sketching the outcrops. It was also the first field course that I must quickly ordered the observations and prepared for the presentation every night. The second time was cooperating with the graduated students and made everything good in only 3 people (the first time we have 5 members ). This time, I try to using the what I learned in last semester (photogrammetry) and different tools in the field.

Lastly, thanks two instructors, prof. C.Y. Lu and prof. J.C. Hu, give me the chances to participate the course and teach me the geology stories in this area.

The memory video is here:

( https://youtu.be/pFOl9ieOuuY )



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