Highwall mining is often used when excavating an open-pit mine becomes too expensive. There are many advantages over underground mining, including the fact that it is both more cost-effective and involves less lead time.
UNIFORMITARIANISM IS DEFINED IN THE AUTHORITATIVE GLOSSARY OF GEOLOGY AS THE FUNDAMENTAL PRINCIPLE THAT GEOLOGIC PROCESSES AND NATURAL LAW.
C.) spring tides, during the moon'squarter phases the sun and moonwork at right angles, causing the bulges to cancel each other. The result is a smaller difference between highand low tides and is known as a neaptide. Neap tides are especially weaktides.
