🕰️ Former KCR Clock Tower - Granite Weathering 🕰️
Description: Introduction / 描述: 簡介🇬🇧🇭🇰
Welcome to the granite base of the Former Kowloon-Canton Railway Clock Tower in Tsim Sha Tsui.
Although the tower is a well-known landmark, the focus of this EarthCache is the natural granite stone used in its foundation. The lower part of the tower is constructed from large granite blocks, an igneous rock commonly used in Hong Kong for its strength and durability.
At this location, you can walk around the base and observe the blocks from different angles. Each face of the granite shows slightly different patterns of colour change, surface roughness, and moisture effects, caused by Hong Kong’s humid marine climate. The tower stands close to Victoria Harbour, so the stone is exposed daily to salt-laden air, rainfall, and strong shifts between sun and shade. These natural conditions create visible signs of tropical marine weathering, which you can observe during your visit.
This EarthCache highlights how the environment affects granite over time, giving visitors a chance to examine real examples of weathering on a widely used building stone.
歡迎來到尖沙咀前九廣鐵路鐘樓的花崗岩基座。
雖然鐘樓是著名地標，但此地質練習的焦點是其基座所使用的天然花崗岩石材。鐘樓的下部由大型花崗岩石塊建造，花崗岩是一種火成岩，在香港廣泛使用，因其堅固和耐久性而受到青睞。
在此位置，您可以沿著基座四周走動，從不同角度觀察石塊。每個面都呈現出略有不同的顏色變化、表面粗糙度及濕度影響，這些都是由香港潮濕的海洋氣候造成的。鐘樓靠近維多利亞港，因此石材每天都暴露於含鹽的空氣、降雨，以及強烈的日照與陰影交替中。這些自然條件形成了熱帶海洋風化的可見跡象，您可於參觀時觀察。
此地質練習讓訪客了解環境如何隨時間影響花崗岩，並有機會親眼觀察常用建築石材的風化實例。
Reference Photo:
The photo below shows one accessible side of the granite base. You may use this view, or any similar side, when completing the educational tasks.
下圖展示基座其中一個可接近的側面。您可以使用這一側，也可以選擇基座其他相似的側面來完成觀察任務。
🪨Educational Notes (Geological Learning) / 教育筆記（地質學習）🇬🇧🇭🇰
Granite is a common igneous rock, formed deep underground from cooled magma. It is made mostly of quartz, feldspar, and mica, which give it strength and durability. Because of these properties, granite has been widely used in Hong Kong for buildings, monuments, and pavements.
However, even a strong rock like granite changes over time. In Hong Kong’s marine tropical climate, the granite at the Clock Tower base is exposed to high humidity, frequent rainfall, salty sea air, and cycles of sun and shade. These conditions speed up chemical and physical weathering, creating visible effects such as surface roughening, colour changes, small cracks, and patches of darkened moisture marks.
At this site, you can see how tropical marine weathering acts differently on each granite block. Some surfaces may appear smoother, others rougher; some colours may fade or darken. This is a natural record of the interaction between stone and environment over decades.
Builders choose granite for its strength, durability, and resistance to rapid erosion, even in harsh conditions like near the harbour. By observing this base, you can connect what you see to the geological processes that shape granite in tropical coastal settings, something you don’t always notice in ordinary urban structures.
花崗岩是一種常見的火成岩，由地底深處冷卻的岩漿形成。它主要由石英、長石和雲母組成，因此具有堅固和耐久的特性。在香港，花崗岩廣泛用於建築、紀念碑及路面。
即使像花崗岩這樣堅硬的岩石，也會隨時間改變。在香港熱帶海洋氣候下，鐘樓基座的花崗岩經常受到高濕度、頻繁降雨、含鹽海風，以及日照與陰影交替的影響。這些條件加快了化學和物理風化，產生可見現象，例如表面粗糙、顏色變化、小裂縫，以及潮濕痕跡的暗色斑點。
在此地，您可以觀察到熱帶海洋風化對不同花崗岩石塊的影響。有些表面看起來較光滑，有些則較粗糙；顏色可能褪淡或變深。這是石材與環境長期互動的自然記錄。
建築師選用花崗岩，是因為它堅固、耐久，且在靠近海港等惡劣環境下不易迅速侵蝕。透過觀察這個基座，您可以將所見與熱帶沿海環境下的地質過程聯繫起來 - 這是在普通城市建築中不容易注意到的自然現象。
🔎Observation & Logging Tasks / 觀察 & 記錄任務
To log this EarthCache, please complete the following tasks based on your observations of the granite base. You may answer in your preferred language.
1️⃣ Mineral Identification: Look closely at the granite surface. Identify at least two visible minerals, such as quartz, feldspar, or mica.
2️⃣ Surface Texture: Describe the texture of the granite. Is it smooth, rough, or uneven? Note any differences between blocks or surfaces.
3️⃣ Weathering Signs: Observe the granite for colour changes, cracks, or darkened patches from moisture. Describe one example of each type of visible weathering.
4️⃣ Environmental Effects: Explain how salt-laden air, rainfall, or sun/shade cycles may have contributed to the weathering you see.
5️⃣ Comparison: Pick two blocks or surfaces at the base. Compare how each has weathered differently. Describe at least one difference you notice.
6️⃣ Photo Task:
You may include a photo showing your visit at the site with the Former KCR Clock Tower in the background.
This could include you, your GPS device, a signature item, or a trackable.
(Optional: you do not have to appear in the photo if you prefer.)
Feel free to share as many photos as you like, they will make a wonderful addition to your log!
🌿Environmental / Safety Notes:
Please do not touch, climb, or lean on the granite blocks.
Respect the heritage site and other visitors.
Keep a safe distance from the edges of the base.
Avoid leaving any trash or marks at the site.
📚References / Further Reading
Wikipedia – Granite: https://en.wikipedia.org/wiki/Granite
Eggleton, R.A. (2001). Weathering of Granite in Tropical Environments. Cambridge University Press.
📌 Important Logging Note
Please do not include your answers in your online log.
Send them privately to the cache owner via message or email.
Once your answers are ready, go ahead and log your find, the Clock Tower will happily ring in my phone on your success!
If any detail is unclear or missing, CO may contact you for clarification.
You are very welcome to share as many photos of your visit as you like.
Your beautiful memories help bring this place to life for future visitors!
However, logs that reveal answers or do not meet the requirements may be deleted.
If you have any difficulty with the questions, just send me a message, I’m always happy to help.
Please take a moment to write a meaningful log and share your experience.
Your stories make this EarthCache more enjoyable for everyone.
If you enjoyed your visit, consider awarding a ❤️Favourite Point❤️, it truly makes my day! 🥰
P.S. An EarthCache is a special type of geocache that brings you to a location where you can learn about a unique geological feature or process.
The real treasure here is not a container, but the knowledge and experience you gain about our planet.
Happy EarthCaching! 🌏
🌏2025🇲🇾🇭🇰
Lexus Kero @ GeoBorneo💫🇲🇾
Appreciation and Congratulation:
㊗️Congratulations🥳🎊 to nelsonylau and pooh_winne for the joint (FTF) 🥇
2025 Favourite Point TQ ❤️🥰: Maaaxxxxx, sansan_, SpiderDuck,
2026 Favourite Point TQ ❤️🥰: TeamAJKJ, sweet-marie, karba1, Alamogul, Stellasuisse, cc cache!,
