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Exploring Oamaru Limestone at St Matthew Church EarthCache

Hidden : 3/17/2024
Difficulty:
1.5 out of 5
Terrain:
2.5 out of 5

Size: Size:   other (other)

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Geocache Description:


Location: St. Matthew's Church, Auckland, New Zealand

Description: Welcome to St. Matthew's Church, an architectural marvel nestled in the heart of Auckland, New Zealand. As you stand before this stunning structure, you're not just witnessing a beautiful place of worship but also a testament to the geological wonders of the region. This Earthcache invites you to explore the unique characteristics of Oamaru Limestone that contribute to the beauty and resilience of St. Matthew's Church.

Oamaru Limestone: Oamaru Limestone is a distinctive geological formation found predominantly in the Oamaru region of New Zealand's South Island. It is renowned for its creamy-white appearance and the ease with which it can be carved. The limestone used in the construction of St. Matthew's Church was quarried locally, reflecting a long tradition of utilizing this abundant natural resource in architecture.

Features to Observe:

  1. Texture and Composition: Take a moment to observe the texture of the limestone used in St. Matthew's Church. Notice its fine-grained nature and the presence of fossilized remains, such as shells and marine organisms, embedded within the stone. These fossils provide evidence of the limestone's marine origins, formed over millions of years from the accumulation of calcium carbonate-rich sediments on the seabed.

  2. Weathering Patterns: As you examine the exterior of the church, look for signs of weathering on the limestone surfaces. Notice how exposure to the elements has shaped the stone over time, creating intricate patterns and textures. This weathering process, known as dissolution, occurs as rainwater reacts with the calcium carbonate in the limestone, slowly eroding the surface and giving it a distinctive aged appearance.

  3. Architectural Adaptations: Marvel at the architectural adaptations employed in St. Matthew's Church to enhance the longevity of the limestone construction. Pay attention to features such as buttresses, which provide structural support and help distribute the weight of the stone, thereby reducing the risk of collapse due to geological instability.

Claiming this Cache:

To log this Earthcache, please answer the following questions:

  1. Describe the texture of the Oamaru Limestone used in St. Matthew's Church.
  2. How have weathering processes influenced the appearance of the limestone surfaces?
  3. Identify one architectural adaptation aimed at enhancing the durability of the limestone construction.
  4. Take a picture of you, your gps or a personal item.

Note: Please do not post your answers in your log. Instead, send your responses directly via e-mail or messaging.
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