On The Run #8 - War & Weathering

Welcome to the 'On the Run' series, brought to you by Troopbiz and DOBIEST! Whether you're squeezing in a quick cache between errands, out for a leisurely Sunday stroll, or tackling your long run, these easy-to-find hides are perfect for filling in your map and adding a little adventure to your day. We hope this series gives you just the excuse you need to get outside and get some

This is an Earthcache. There is no physical container at the posted coordinates, but rather a geological lesson for you to explore. Please review the information on the cache page, then make your way to Ground Zero to make your observations and answer the three questions below. Email your answers to the cache owner by clicking the "message this owner" button above, and once complete, you can log this cache.

Thanks and happy caching!

QUESTIONS

1. Describe the detail of the state seal, swords, and horn carved into the monument. Do you think these depictions are susceptible to weathering or not?

2. There are several different types of rock used to construct this monument, how do you think the different layers are affected differently by the height of the monument?

3. Locate the nearby cannon. How is the weathering here different?

(Optional) Post a picture of yourself with the monument in the background.

In a Monongalia County cemetery stands a Spanish-American War monument, a towering structure of intricately carved stone, crowned with the figure of a soldier in a timeless stance. These grand war statues serve as enduring memorials to the sacrifices made during conflicts, offering a sense of permanence and reverence. The height and elaborate design symbolize honor and prominence, lifting the memory of the fallen above the ordinary world. The figures at the top often personify bravery or vigilance, acting as silent sentinels over the graves below, ensuring that the stories of those who served are never forgotten.

War monuments are excellent tools for learning about geology because they showcase the durability, texture, and aesthetic qualities of various types of rock. Many of these statues are crafted from materials like granite, limestone, or marble, each offering a unique insight into geological processes. For example, granite reveals the crystalline structure formed deep within Earth's crust, while limestone often contains fossilized remains that highlight ancient marine environments. By studying the weathering patterns and mineral compositions of these stones, geologists can understand how different materials endure over time in natural conditions. These monuments also provide a tangible connection between human history and Earth's natural history, making geology more accessible and engaging.

Cemeteries are excellent places to study geology because they showcase a variety of stone materials used for gravestones, monuments, and sculptures, often including granite, marble, slate, limestone, and sandstone. These stones, many of which are dated with inscriptions, provide a unique opportunity to observe how weathering occurs over time. By comparing stones of different ages and materials, geologists can study the effects of environmental factors such as rain, wind, and pollution on rock durability and surface degradation. The clear dating allows for a timeline of weathering processes, making it easier to understand the long-term effects of exposure. Cemeteries also reflect the local geology, as many stones are sourced from nearby quarries, offering insights into regional geological history and the interplay between human use of natural materials and Earth's processes.

Don't Take Geology For Granite

Granite is an igneous rock formed from the slow cooling and solidification of magma deep within Earth's crust. It is composed primarily of quartz, feldspar, and mica, giving it a speckled appearance and a range of colors from light gray to pink and black. Granite is prized for its strength, durability, and resistance to weathering, making it an ideal material for monuments and gravestones. Its polished surface can retain inscriptions and designs for centuries. (Reference)

In West Virginia and surrounding areas, granite used for monuments often comes from quarries in states like Vermont, Georgia, and Pennsylvania, which are renowned for high-quality granite. For example, Barre granite from Vermont is famous for its fine grain and consistent quality, while Georgia produces darker granite varieties. Although West Virginia itself has abundant sandstone and limestone, granite is typically imported because of its superior durability and aesthetic qualities for memorials.

Weathering of Stone

Granite weathers primarily through physical, chemical, and biological processes, which can be observed in tall monuments like those at Ground Zero or similar sites. Despite its durability, granite is not impervious to weathering, especially when exposed to the elements over long periods.

1. Physical Weathering: Temperature fluctuations cause expansion and contraction of the minerals in granite. Over time, this can create microcracks, particularly in tall monuments where exposure to direct sunlight and wind is more intense. Freeze-thaw cycles in colder climates exacerbate this process as water enters cracks, freezes, and expands, causing the granite to break apart slowly.

2. Chemical Weathering: Rainwater, which is often slightly acidic due to dissolved carbon dioxide, reacts with the feldspar minerals in granite, leading to the formation of clay minerals and the release of soluble ions like potassium. This process, called hydrolysis, weakens the stone's structure. Tall monuments are particularly susceptible to rain and acid rain exposure on their uppermost and most exposed surfaces.

3. Biological Weathering: Lichens and mosses growing on granite surfaces release organic acids that break down the minerals. These organisms thrive in cracks and crevices, particularly in shaded areas of tall monuments, further accelerating decay.

The height of tall monuments often amplifies these effects because they are more exposed to wind-driven rain, pollution, and temperature extremes. Over time, this weathering can dull polished surfaces, round sharp edges, and cause surface spalling, which are all visible clues to the ongoing interaction between natural processes and human-made structures. (Reference)

Not All Weathering Was Created Equally

Granite and untreated sandstone weather in completely different ways due to their unique compositions, structures, and resistance to environmental factors, which is particularly evident in outdoor structures like granite monuments and sandstone bases for cannons. Granite, a dense and crystalline igneous rock composed of interlocking minerals like quartz, feldspar, and mica, is highly resistant to weathering. Its durability limits physical weathering to minor microcracks caused by freeze-thaw cycles and thermal expansion, while chemical weathering primarily affects feldspar through hydrolysis, leaving the resilient quartz intact. This results in slow surface discoloration or slight rounding of edges, with the structure and details of granite monuments remaining well-preserved for centuries.

In contrast, untreated sandstone, a sedimentary rock composed of quartz and feldspar grains bound by weaker materials like calcite or iron oxide, is far more vulnerable to the elements. Its porous nature allows water to penetrate easily, making it susceptible to significant deterioration through freeze-thaw cycles and the dissolution of its binding materials. Over time, sandstone surfaces crumble as individual grains detach, leaving a gritty texture. Acidic rain and biological growth, such as mosses and lichens, accelerate the breakdown of sandstone, further weakening its structure. As a result, sandstone bases often exhibit rapid erosion, with uneven surfaces, pitting, and the loss of detail, while granite monuments maintain their polished surfaces and defined edges. This stark difference highlights why granite is favored for enduring monuments, while sandstone, though locally abundant, often requires frequent maintenance or replacement. (Reference)