- Sandstone: A rock composed of sand grains that have been cemented together by minerals such as quartz, calcite, or feldspar.
- Shale: A fine-grained rock formed from the compaction and cementation of clay minerals.
- Limestone: A rock formed from the accumulation and cementation of calcium carbonate, often in the form of the mineral calcite.
- Coal: A rock formed from the accumulation and compaction of plant matter that has been subjected to heat and pressure over time.
On the Pyramid Lake Indian Reservation in northwestern Nevada, there were two adjoining lakes, one named after the reservation and the other Lake Winnemucca. But the construction of the Derby Dam on the Truckee River in 1903 and State Highway 447 shortly thereafter (which blocked its connection to
A rare piece of glass was discovered during an archaeological dig at Lindisfarne – the small Northumbrian island whose medieval monastery was raided by Vikings in 793 AD, heralding the start of the Viking Age in Britain. The piece was discovered in September 2019 during a community archaeological d
For three weeks, a team of researchers reported day by day on their scientific expedition to Egypt with a series of articles published daily on the Sciences et Avenir website. . Here are the Notebooks of Egypt... Inside a Theban tomb, Egypt. It was a first:for three weeks, from November 19 to Dec
Sunken about 1,200 years ago, the cities of Heracleion and Canopus, in Egypt, were forgotten for centuries. Spotted in the 2000s by archaeologists, they continue to reveal fascinating remains. In recent weeks, a temple dating back to the Ptolemaic era (4th-3rd BC) has been revealed. Discovery of