Lone Star Rockhound

Lone Star Rockhound My wife and I are amateur rockhounds located in Wichita Falls, Tx. Previously from Indiana. Follow along with us!

Not selling anything, just sharing our rockhounding adventures, rock tumbling, treasure hunts with the metal detector and spoils with you!

Arrowhead hunting tip: 365 nm UV flashlight at night helps when the arrowheads are made from chert. They will glow ora...
09/01/2026

Arrowhead hunting tip: 365 nm UV flashlight at night helps when the arrowheads are made from chert. They will glow orange to yellow.

This totally happened more than once this week!
08/28/2026

This totally happened more than once this week!

A couple shots of the partial eclipse tonight!
08/28/2026

A couple shots of the partial eclipse tonight!

🎉 Facebook recognized me for starting engaging conversations and producing inspiring content among my audience and peers...
08/26/2026

🎉 Facebook recognized me for starting engaging conversations and producing inspiring content among my audience and peers! 3 weeks in a row! Thank you all for stopping by and engaging!

Edwards Plateau Chert (specifically the high-quality blue/gray nodular variety often called Edwards Flint). Found in Ne...
08/25/2026

Edwards Plateau Chert (specifically the high-quality blue/gray nodular variety often called Edwards Flint). Found in New Braunfels, Tx

Chert forms when silica-rich fluids compress and crystallize into microcrystalline quartz. Geologists classify this sedimentary rock's formation into two primary pathways: biochemical origin (from the remains of ancient sea life) and chemical replacement (where silica replaces existing minerals).
1. The Biochemical Pathway (Ocean Ooze)
The majority of the world's chert began as a biological "rain" on ancient, deep ocean floors. Microscopic Skeletons: Millions of years ago, tiny marine organisms like radiolarians (plankton) and diatoms extracted dissolved silica from ocean water to build their glassy protective shells. Siliceous Ooze: When these organisms died, their microscopic skeletons sank to the bottom of the deep ocean, accumulating into a thick, jelly-like mud known as siliceous ooze.
Compaction and Recrystallization: As layers of other sediment buried this ooze, temperature and pressure rose. The amorphous silica shells slowly dissolved into pore water and reprecipitated as ultra-fine, tightly interlocking quartz crystals, hardening into solid beds of chert.
2. The Chemical Replacement Pathway
Chert can also form when silica-heavy groundwater aggressively alters a pre-existing rock or material, a process known as diagenetic replacement or chertification.
Limestone Voids: Groundwater carrying dissolved silica (often sourced from nearby volcanic ash eruptions) seeps through porous rocks like limestone or chalk.
Mineral Swapping: The acidic, silica-rich water dissolves the host rock's calcium carbonate and replaces it atom-for-atom with silicon dioxide (SiOâ‚‚).
Nodules and Nodular Flint: Because this happens unevenly, it often results in smooth, irregular chert nodules trapped inside layers of limestone. When this specific replacement happens inside soft chalk, geologists call the resulting nodules flint.
Organic Fossils: This exact same replacement chemistry is what drives the formation of petrified wood and fossilized agate voids, transforming organic material into durable stone.

Address

1267 Nunya Avenue
Wichita Falls, TX
76302

Website

,

Alerts

Be the first to know and let us send you an email when Lone Star Rockhound posts news and promotions. Your email address will not be used for any other purpose, and you can unsubscribe at any time.

Shortcuts

Share

Category