At the posted coordinates, you can see a unique geological feature: Vase Rock, a sea stack, which is the famous landmark of Xiaoliuqiu. In this Earthcache you will learn about sea stacks and their formation.
在這個 Earthcache 中，您將了解海蝕柱及其形成。在發布的座標處，您可以看到一個海柱的例子－花瓶岩，小琉球的著名地標。
What is a sea stack?
A sea stack is a geological landform consisting of a steep and often vertical pillar or column of rock that protrudes from the sea or the ocean.
什麼是海棧？
海蝕柱是一種地質地貌，由從大海或海洋中突出的垂直柱或岩柱組成。
How are sea stacks formed?
Sea stacks are formed through a series of geological processes:
- First of all, a headland - a coastal landform jutting into the sea - is shaped by coastal erosion. Over millions of years, waves and weathering erode away weaknesses in the headland. Sea caves within the headland are created by the repeated pounding of waves.
You can still see verious sea caves in other places around Xiaoliuqiu.
- Over time, erosion will enlarge these sea caves. Eventually the cave breaks through the headland and forms an arch. This arch looks like a natural bridge over the sea.
- As the erosion and weathering continue, the arch is weakening until it finally collapses.
- A tall and detached column of rock is left behind - a sea stack was formed, just like the beautiful Vase Rock here at the coordinates. At the same time, you can also still see the rest of the headland behind you.
- After the formation of a sea stack, erosion and weathering won't stop. In the long run the sea stack will be completely eroded by waves, wind and other natural forces.
海蝕柱是如何形成的？
海蝕柱是透過一系列地質作用形成的：
首先，岬角——一種伸入海中的海岸地形——是由海岸侵蝕形成的。數百萬年來，海浪和風化侵蝕了岬角的弱點。海岬內的海蝕洞是由於海浪的反覆衝擊而形成的。
隨著時間的推移，侵蝕將會擴大這些海蝕洞。最終，洞穴突破了岬角，形成了一個拱門。這座拱門看起來就像一座橫跨大海的天然橋。
隨著侵蝕和風化的持續，拱門逐漸減弱，直到最終倒塌。
留下了一根高大而獨立的岩石柱，形成了海柱，就像小琉球這裡美麗的花瓶石一樣。
海蝕柱形成後，侵蝕和風化就不會停止。從長遠來看，海柱將被海浪、風和其他自然力量完全侵蝕。
Source: Unique Features of the Kenai Fjords Coast (U.S. National Park Service) (nps.gov)
Logging Tasks:
- With the help of the listing, explain in your own words how a sea stack is created.
- At the coordinates, take a look at Vase Rock's unique shape. You will easily see that Vase Rock is not a typical sea stack because it is not a vertical column. Please explain in your own words how this unique, untypical shape has been formed. Take into account the location of Vase Rock and which natural forces might have influenced its formation based on that.
- Taking into account your answers of questions 1 and 2 and the information provided in the listing, what will happen to Vase Rock in the long run?
- What can you see on top of Vase Rock? When you know the correct answer, you will understand why this sea stack is called Vase Rock.
- Take a picture of yourself, your GPS or something that belongs to you at the posted coordinates.
Please send me the answers to the questions via the Message Center. After that you can log your find immediately. I will try to answer you as soon as possible. :)
Enjoy your visit and enjoy the view!
Joskaranch
記錄任務：
1. 在清單的幫助下，用自己的話解釋如何建立海棧。
2. 在座標處，看看花瓶石獨特的形狀。您會很容易看到花瓶岩不是典型的垂直海蝕柱。請用自己的話解釋一下這種獨特的、非典型的形狀是如何形成的。考慮到花瓶岩的位置以及可能影響其形成的自然力量。
3. 考慮到您對問題 1 和 2 的回答以及清單中提供的信息，從長遠來看，Vase Rock 會發生什麼？
4. 在花瓶岩的頂部你能看到什麼？當你知道正確答案後，你就會明白為什麼這個海柱被稱為花瓶岩。
5. 在發布的座標處拍攝您自己、GPS 或屬於您的物品的照片。
請透過訊息中心將問題的答案寄給我。之後，您可以立即記錄您的發現。我會盡力盡快回覆您。