Paleontologist and Geologist Dr. Ken Lacovara joins WIRED to answer the internet's burning questions about fossils. Can we ...

Places such as Purgatory Chasm and Millstone Hill, in Worcester's Green Hill Park, bear witness to the work of the glaciers.

As a petroleum-producing basin, it features a significant presence of igneous rocks. Additionally, the multiple episodes of igneous rocks interbed with the sedimentary layers make it unique for ...

This 1930s educational film explores the natural landscapes, geological formations, and agricultural practices of the time. It features scenes of farmers tilling soil, majestic mountain roads ...

Key takeaways A mineral is a naturally occurring, inorganic solid with a definite chemical composition, while rock is a mass of one or more minerals. There are three main types of rocks: igneous, ...

Nearly two-thirds of the book is devoted to igneous rocks, and both in this section and in those dealing with the sedimentary and metamorphic rocks, the treatment of rock-forming minerals, and ...

Unlike an igneous basalt crystallised from lava, or a sedimentary sandstone laid down by water, metamorphic rocks form in one environment, then go on journeys deep in the crust. This makes them the ...

Classification of Rocks Rocks are classified based on three major factors as follows : Geological classification Physical classification Chemical classification 1. Geological classification Rocks are ...

Books Received Published: 02 July 1949 Rocks and Rock Minerals P. A. S. Nature 164, 6 (1949) Cite this article ...

Some rocks are mono-mineralic, meaning they only contain one mineral. Limestone, for example, is a sedimentary rock made exclusively of the mineral calcite (CaCO3).