Osage Rock & Mineral Club

Osage Rock & Mineral Club The purpose of this club, is to share knowledge of lapidary and earth sciences. To enhance collecti Meetings start at 7 pm with a program to follow.

Social Hour is from 6-7 PM where we share rock, minerals and fossils specimens, stories and refreshments. We are very informal relaxed group with a variety of interest and knowledge in the rock & mineral world.

Lapis lazuli has one of the longest, most geographically expansive histories of any gemstone. The oldest known mines, Sa...
04/25/2026

Lapis lazuli has one of the longest, most geographically expansive histories of any gemstone. The oldest known mines, Sar‑e‑Sang in Badakhshan, Afghanistan, were already active by the 7th millennium BC, supplying a deep blue stone so rare that Neolithic and Bronze Age cultures treated it as sacred.
From these mountains, lapis traveled astonishing distances: to the Indus Valley, where beads appear in early burials; to Mesopotamia, where it entered elite ritual objects as early as the Ubaid period (c. 4900–4000 BC); and to Egypt, where it symbolized the heavens and resurrection and was embedded in amulets and royal regalia, including the mask of Tutankhamun.
Its scarcity, intense color, and association with the divine made it more valuable than gold in many ancient societies.
By the mid‑ to late Bronze Age (c. 2000–1000 BC), lapis lazuli had become a cornerstone of long‑distance trade linking Central Asia, the Near East, and North Africa. Caravans carried it westward along land routes through Iran and Mesopotamia, while later maritime routes expanded its reach.
Afghan lapis dominated the ancient world because of its unmatched quality, and its movement across continents reflected shifting political alliances, trade networks, and religious symbolism. By the Middle Ages, Europe imported lapis to grind into ultramarine, the most prized blue pigment of Renaissance art, further extending its cultural legacy.

Mark your Calendars!
03/29/2026

Mark your Calendars!

03/10/2026
These odd sandy patches are the fingerprints of some of the largest earthquakes in U.S. history. 🧐😲Pale patches of sand ...
01/31/2026

These odd sandy patches are the fingerprints of some of the largest earthquakes in U.S. history. 🧐😲

Pale patches of sand stand out like scars against the deep greens and browns of the fields. To most people, they're insignificant. But to anyone familiar with the history of this landscape, they're lingering reminders of a cataclysm that shook the region over 200 years ago.

These are the remnants of sand blows caused by the 1811–1812 New Madrid earthquakes, a sequence of three massive magnitude 7–8 events that tore through what is now northeastern Arkansas, southeastern Missouri, northwestern Tennessee, and southwestern Kentucky.

During those violent months, the shaking destroyed river settlements, triggered landslides, and even made the Mississippi River appear to reverse its flow.

The tremors were felt more than a thousand miles (1,600 km) away—in places as far-flung as Connecticut, South Carolina, and Louisiana.

One of the most dramatic consequences was liquefaction, when saturated ground behaves like a fluid. Under the intense shaking, pressurized water and sand erupted onto the surface, forming sand blows and fissures that covered more than 4,000 square miles (10,400 km²).

Ranging from a few inches to several feet across, sand blows often resemble miniature volcanic cones.

The sandy patches near New Madrid, Missouri are the enduring remnants of these dramatic sand blows, still imprinted into the landscape more than two centuries later.

Today, the New Madrid Seismic Zone remains one of the most closely monitored geologic regions in the United States. Studies estimate a 25–40% chance of a magnitude 6.0 or greater earthquake in the next 50 years, with a 7–10% chance of a repeat of the 1811–1812 events.

For nearby major cities like Memphis and St. Louis, the risks to infrastructure, real estate, and regional finance remain significant.

For travelers, residents, and anyone curious about Earth’s hidden forces, these sandy patches offer a rare chance to read history directly from the ground. They are a striking reminder that the fingerprints of some of the most powerful events in American geologic history are still etched into the landscape all around us. 🌎

Source: usgs[dot]gov/programs/earthquake-hazards/new-madrid-seismic-zone

An ancient meteor blasted a crater 12 miles wide in Missouri—and the evidence is visible still today. 😲☄️Imagine standin...
01/21/2026

An ancient meteor blasted a crater 12 miles wide in Missouri—and the evidence is visible still today. 😲☄️
Imagine standing on gentle, rolling farmland in western Missouri, unaware that the ground beneath your feet is the site of a colossal ancient catastrophe.
Beneath layers of soil and prairie grass is a huge geological wound: a crater nearly 12 miles (19 kilometers) across—the legacy of a powerful meteor impact that struck Earth around 340 million years ago.
This is the Weaubleau (or Weaubleau-Osceola) impact structure—one of the largest and most significant impact structures in the United States.
The impact was so powerful that chunks of rock from nearly 1,300 feet (400 meters) below the surface were blasted upward and mixed with fossils from different geological eras. Fossils normally separated by millions of years of geological history are found jumbled together inside the crater’s breccia—a chaotic mixture of rock fragments and mud.
Most intriguing at Weaubleau are the “Weaubleau Eggs”—odd spherical rocks scattered across the crater surface that were formed by weathering and erosion after the impact.
The shocking scale of destruction is evident at sites like the Ash Grove Aggregates quarry on the crater’s edge, where entire layers of limestone are so violently contorted and shattered that geologists describe the scene as a “train wreck.” Blocks the size of cars and houses are tilted and folded together—a testament to the sheer force of the impact.
The Weaubleau crater is massive, but much of it remains hidden beneath Missouri's farmland and forest. For those interested in travel, geology, science, or the natural history of Missouri, this site is a powerful reminder of Earth’s dynamic past and how it has been shaped by forces from beyond our atmosphere.
Source: impactcraters[dot]us/weaubleau_missouri

https://www.facebook.com/share/p/1EYDCH4uU9/
01/12/2026

https://www.facebook.com/share/p/1EYDCH4uU9/

Missouri’s gigantic meteor crater hiding in plain sight. 😲☄️

The landscape here looks ordinary—gently rolling hills, quiet country roads, and a patchwork of forests and farmland. There’s no dramatic pit, no towering rim, nothing that immediately hints at catastrophe.

Most people travel along Missouri Route 5 without realizing the ground beneath them was violently reshaped in a single moment by forces from beyond Earth.

This subtle but extraordinary feature is the Decaturville impact structure, located in central Missouri near the town of Decaturville.

The crater measures about 3.7 miles (6 kilometers) across and formed roughly 300 million years ago, when a meteorite slammed into the region and released an immense amount of energy in a fraction of a second.

Unlike fresh impact craters with sharp, obvious rims, Decaturville has been heavily altered by time. Millions of years of erosion have softened its edges and obscured its original shape.

But if you look closely, the fingerprints are unmistakable: ring faults and a central uplift area with shatter cones—rare rock formations created only under extreme shock pressures.

The disruption to the bedrock is even visible today in a roadcut along Highway 5, about 16 miles (26 kilometers) north of Lebanon, where tilted and fractured rock layers reveal the violence of the ancient collision.

The impact would have generated heat and pressure equivalent to hundreds of one-megaton nuclear explosions, shattering rock, rearranging deep layers of the crust, and permanently altering the local geology.

Decaturville is a powerful reminder that even in the heart of the Midwest, extraordinary stories lie just beneath the surface—and that some of Earth’s most dramatic events leave behind subtle scars that are easy to overlook.

Source: Wikipedia, pubs[dot]usgs[dot]gov/pp/1042/report[dot]pdf

And now for the adventures of Geode Family Fest 2025.  This year was a bit different since we had several members of the...
10/19/2025

And now for the adventures of Geode Family Fest 2025. This year was a bit different since we had several members of the Osage Rock and Mineral Club come this year as a field trip. Weather was perfect for the weekend. Went to 4 places, Hoppe's (a new one for this year that was part of the fest 12 years ago. let's hope we don't have to wait another 12 years.), Renard's, Cooper's and St. Francisville. Locations and comments are with the pictures.

At our meeting this Thursday, we will be cracking more of our finds, so there will be more photos and possibly videos to come.

People of a certain age will get this....
09/11/2025

People of a certain age will get this....

09/05/2025

Remember...no Club meeting in September. See you at Geode Family Fest in Keokuk IA September 25-28th!

Address

901 Highway 42
Osage Beach, MO
65065

Website

Alerts

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

Share