The Times Australia
The Times World News

.

Stone Age herders transported heavy rock tools to grind animal bones, plants and pigment

  • Written by Maria Guagnin, Postdoctoral Researcher, Max Planck Institute of Geoanthropology
Stone Age herders transported heavy rock tools to grind animal bones, plants and pigment

About 7,000 years ago, a small group of people sat around a fire, next to a small lake in what is now the Nefud Desert of northern Saudi Arabia.

We found some of the tools they left behind – and on close inspection of the tools, we discovered these Stone Age herders were busy grinding animal bones, wild plants and pigments while their meat was cooking.

Our results are published in a new paper[1] in PLOS ONE.

Herders and artists

Our earlier research[2] has shown that between 10,000 and 6,000 years ago much of Arabia was far wetter and greener than it is today.

Grasslands spread, and trees and shrubs grew near water sources. Lakes formed and provided water. Herders lived around these lakes and led their cattle, sheep and goats to the best pastures.

These Stone Age herders were also skilled artists. They carved thousands of images into rock surfaces on cliffs and boulders, documenting their daily lives.

The rock art shows Stone Age people hunting gazelles, wild donkeys and ibex, and it also shows their most precious possession: their cattle.

Stone Age camp sites

Archaeological sites[3] from this period consist of collections of small fireplaces. The herders seem to have been extremely mobile, moving around the landscape with their herds, searching for pasture and water.

On these routes they made small camps near lakes, returning to the same places again and again as the years passed and the seasons turned.

Read more: Research reveals humans ventured out of Africa repeatedly as early as 400,000 years ago, to visit the rolling grasslands of Arabia[4]

A few years ago, we discovered one such camp at Jebel Oraf, near the Jubbah Oasis, in the Nefud Desert of Northern Saudi Arabia.

On the shores of a small, ancient lake, we discovered 170 small fireplaces. We excavated 17 of these fireplaces and radiocarbon dating showed that most of them are between 7,200 and 6,800 years old.

Photos showing a grinding stone assembled from smaller pieces.
A grinding stone reassembled from fragments appears to have had two holes for carrying with a rope or cord. Ceri Shipton, CC BY[5]

What surprised us was that the small camps were full of grinding tools. Most of them had been broken into smaller pieces, and then placed on top of the fire. Some had had holes drilled into them to attach a rope to help carry them.

Although people were moving a lot, they took heavy grinding stones weighing up to three kilograms with them. It’s not clear how the grinding stones were transported – either they were carried by people or perhaps they were strapped to their cattle. Regardless, these grinding tools seem to have been very important to them.

Today the Jubbah Oasis is extremely arid and for archaeologists that means organic remains don’t survive. This made it very difficult to find out what the purpose of these grindstones was.

There are no plant remains in the archaeological sites, and animal bones only survive in small fragments. So, we turned to microscopic analysis in order to help determine the function of the grinding tools.

Microscopic traces

In experiments we find that grinding different materials, such as bone, pigment, or plants, leaves distinctive microscopic marks on the surface of the grinding tools. These marks, including striations, fractures, rounding of individual quartz grains and different types of polish, can be seen with a microscope.

We looked at the Stone Age grinding tools to identify similar traces, and from them to determine what materials were ground.

Our microscopic study showed the grindstones were used for a range of different purposes.

Some were used to process bones. We know the fires were used to cook the meat of cattle, sheep and goats, and of game such as oryx and ostrich.

Photos of a stone grinding tool and high-magnification pictures of marks on its surface. A stone grinding tool showing microscopic traces of plant and pigment processing. Giulio Lucarini, CC BY[6]

We think the herders broke open animal bones to get to the marrow. Bone marrow is high in fat, and this would have helped them to get extra nutrition.

Our analysis also showed they ground plants. None of the actual plant remains have survived, so we don’t know if they ground wild plants to make simple breads, or if they pounded plant fibres to make baskets or rope.

Both would have been important for their lifestyle. They moved a lot and bread would have been easy to preserve and carry around. Baskets and rope would have been used for storage and transport and also to construct simple, transportable shelters.

The grinding tools also showed pigment was processed. Red shale, a rock found in nearby mountains, can be used like a crayon or ground into red powder and mixed into paint.

Photos showing rock art drawings of different animals, with different pigments highlighted. Painted rock art from northern Saudi Arabia hints at the importance of pigment processing. Maria Guagnin, CC BY[7]

Painted rock art doesn’t often survive. Over the centuries it is washed off by rain and wind.

Only one painted rock art site from the Neolithic survives near Jebel Oraf. It shows cattle with beautiful long horns.

The grinding stones are now evidence that painted art may once have been a lot more widespread.

Valuable tools

Our analysis of the grinding marks also showed the tools were often used for different materials over time. They were clearly valuable and used as much as possible.

At the end they were broken into smaller pieces. In some cases we were able to piece back together up to 12 fragments. We’re still not sure why the discarded tools were placed on the fire – perhaps they used them to cook or to dry their meat.

Grinding stones appear to have been an important tool for mobile herders 7,000 years ago. Although they would have been hard to carry, these tools allowed Stone Age herders to produce food resources and plant materials that were vital to their highly mobile lives.

Read more: Enigmatic ruins across Arabia hosted ancient ritual sacrifices[8]

References

  1. ^ a new paper (journals.plos.org)
  2. ^ research (www.pnas.org)
  3. ^ Archaeological sites (www.sciencedirect.com)
  4. ^ Research reveals humans ventured out of Africa repeatedly as early as 400,000 years ago, to visit the rolling grasslands of Arabia (theconversation.com)
  5. ^ CC BY (creativecommons.org)
  6. ^ CC BY (creativecommons.org)
  7. ^ CC BY (creativecommons.org)
  8. ^ Enigmatic ruins across Arabia hosted ancient ritual sacrifices (theconversation.com)

Read more https://theconversation.com/stone-age-herders-transported-heavy-rock-tools-to-grind-animal-bones-plants-and-pigment-214838

Times Magazine

Headless CMS in Digital Twins and 3D Product Experiences

Image by freepik As the metaverse becomes more advanced and accessible, it's clear that multiple sectors will use digital twins and 3D product experiences to visualize, connect, and streamline efforts better. A digital twin is a virtual replica of ...

The Decline of Hyper-Casual: How Mid-Core Mobile Games Took Over in 2025

In recent years, the mobile gaming landscape has undergone a significant transformation, with mid-core mobile games emerging as the dominant force in app stores by 2025. This shift is underpinned by changing user habits and evolving monetization tr...

Understanding ITIL 4 and PRINCE2 Project Management Synergy

Key Highlights ITIL 4 focuses on IT service management, emphasising continual improvement and value creation through modern digital transformation approaches. PRINCE2 project management supports systematic planning and execution of projects wit...

What AI Adoption Means for the Future of Workplace Risk Management

Image by freepik As industrial operations become more complex and fast-paced, the risks faced by workers and employers alike continue to grow. Traditional safety models—reliant on manual oversight, reactive investigations, and standardised checklist...

From Beach Bops to Alpine Anthems: Your Sonos Survival Guide for a Long Weekend Escape

Alright, fellow adventurers and relaxation enthusiasts! So, you've packed your bags, charged your devices, and mentally prepared for that glorious King's Birthday long weekend. But hold on, are you really ready? Because a true long weekend warrior kn...

Effective Commercial Pest Control Solutions for a Safer Workplace

Keeping a workplace clean, safe, and free from pests is essential for maintaining productivity, protecting employee health, and upholding a company's reputation. Pests pose health risks, can cause structural damage, and can lead to serious legal an...

The Times Features

Tricia Paoluccio designer to the stars

The Case for Nuturing Creativity in the Classroom, and in our Lives I am an actress and an artist who has had the privilege of sharing my work across many countries, touring my ...

Duke of Dural to Get Rooftop Bar as New Owners Invest in Venue Upgrade

The Duke of Dural, in Sydney’s north-west, is set for a major uplift under new ownership, following its acquisition by hospitality group Good Beer Company this week. Led by resp...

Prefab’s Second Life: Why Australia’s Backyard Boom Needs a Circular Makeover

The humble granny flat is being reimagined not just as a fix for housing shortages, but as a cornerstone of circular, factory-built architecture. But are our systems ready to s...

Melbourne’s Burglary Boom: Break-Ins Surge Nearly 25%

Victorian homeowners are being warned to act now, as rising break-ins and falling arrest rates paint a worrying picture for suburban safety. Melbourne residents are facing an ...

Exploring the Curriculum at a Modern Junior School in Melbourne

Key Highlights The curriculum at junior schools emphasises whole-person development, catering to children’s physical, emotional, and intellectual needs. It ensures early year...

Distressed by all the bad news? Here’s how to stay informed but still look after yourself

If you’re feeling like the news is particularly bad at the moment, you’re not alone. But many of us can’t look away – and don’t want to. Engaging with news can help us make ...