Rockology 101

Welcome to class! This is a place for students of all ages to learn about Rogers Group operations and products or just have a little fun!

Rockology 101: Learning
Bet You Didn't Know
How Aggregates Are Made
How Aggregates Are Transported
How Aggregates Impact Your Life
Why Quarries Are Good Neighbors
The Mining Process
The Open Road
Sand, It's Not Just For Beaches
Farmers Like a Twist of Aglime
Modern Life and The Rock
Properties of Rocks
Rockology 101: Fun Facts
Rockology 101: Activities

The Mining Process

Rockology Site Evaluation and Preparation

Site evaluation and preparation requires planning to meet permitting requirements. Guidelines for clearing tress and vegetation; stripping, transporting, and storing topsoil and overburden; constructing fences, berms, buffer zones, roadways, and sediment traps; and constructing or installing permanent or portable processing equipment are followed.

Mining and Processing

Mining of crushed stone or sand and gravel is dependent on the geologic characteristics and the extent and thickness of the natural deposit. Open-pit mining and quarrying are most commonly used, although some stone is mined underground. Sand and gravel deposits above the water table are excavated with bulldozers, front-end loaders, tractor scrapers, and draglines. Deposits below the water table, including stream and lake bed deposits may be excavated with draglines or from barges using hydraulic or ladder dredges. Mining and quarrying stone generally require drilling and blasting, after which the rock is then transported to a processing facility on trucks and conveyors.

Rockology Processing plants are generally constructed on the site of extraction. Processing of mined or quarried rock requires primary and possible secondary crushing, depending on the sizes of aggregate needed. After crushing, the crushed stone and sand and gravel usually are sorted to size, moved by conveyors to bins or stockpiled.


The goal of reclamation is to return the land to a beneficial use. By planning reclamation before the aggregate is extracted, it can be mined with how the quarry will look when it is reclaimed. This can make it easier to turn quarries into scenic, lake-front property, wildlife parks, golf courses, office parks, roller coaster rides and the many other items a quarry can eventually become. Parts of the mine can be reclaimed while continuing on-going mining operations in some instances.

Reclamation procedures depend on the configuration and character of the area. Progressive reclamation typically involves the following three steps: terracing the pit or face walls during or after extraction, final shaping of the area by replacing and reconfiguring the overburden, and landscaping. Reclamation plans are most effective if operators and planners select a strategy that satisfies the land use needs of the community and at the same time provides an economic incentive for the operator.

Source: The National Energy Foundation