A Message from Space? EarthCache

At the posted coordinates there is a large igneous rock in the cemetery which is the basis for this earthcache. This large rock is no doubt a similar composition to a meteorite, but according to logistics and extreme impossibilities, it is more than likely not a meteorite given how rare that would be and the value it would have. However, all the data sources online consider it to be one, so for this earthcache I will follow their lead and call it one. Please take this into consideration though, I have italicized and highlight in red all the potentiol cases that could be not true depending on the actual origins of this rock. Regardless of the specifics, I hope you enjoy learning about this super cool rock!!

The Gahanna Meteorite was discovered by a local farmer in Gahanna, Ohio, in the early 20th century. The farmer unearthed this significant 700-pound iron meteorite while working his fields. Over time, it was donated to the Mifflin Township Cemetery, where it now serves as a historical marker and a unique memorial. The meteorite’s presence at the cemetery is a lasting reminder of its celestial origins, and its journey to this spot highlights the interplay between human history and extraterrestrial materials.

This meteorite is a rare example of the type of space debris that survives the atmospheric entry and impacts Earth, composed mostly of iron and nickel, making it highly resistant to complete erosion over time, even in Ohio's varying climate.

Meteorite Composition and Erosion

Iron meteorites, like this one, are composed of iron and nickel, which are remnants of ancient planetary bodies formed during the early stages of our solar system. These objects often come from the core of differentiated asteroids, giving them a distinct composition from other types of meteorites.

Over time, exposure to Ohio’s environmental conditions—rain, temperature fluctuations, and oxidation—will gradually degrade the meteorite’s surface. Look closely for signs of rust or pitting, as the iron oxidizes when exposed to moisture and oxygen in the atmosphere.

Iron and Nickel in Meteorites

Iron meteorites like the Gahanna Meteorite are composed primarily of iron, with significant amounts of nickel, typically around 5-20%. These metals form an iron-nickel alloy, with nickel helping to make the meteorite more resistant to corrosion.

Detecting the Difference: Iron tends to rust and oxidize, forming reddish-brown spots, while nickel is more resistant to weathering. You can distinguish them by using a magnet—iron-rich areas will attract strongly. Nickel may also give the meteorite a slightly metallic sheen in weathered areas where the iron has rusted.

The Meteorite's Shape

The irregular shape of the Gahanna Meteorite is a result of its turbulent journey through space and the intense forces it encountered during its descent to Earth. As the meteorite passed through the atmosphere, the immense heat generated by friction caused the outer layers to melt and vaporize unevenly, leading to the formation of its unique shape. Additionally, impacts with other space debris and weathering processes after landing contributed to further shaping. Over time, oxidation and erosion affected its surface, enhancing its distinctive irregularity.