The Paleozoic Era: Continents Reassemble and Life Gets Complex
The Paleozoic EraThe Paleozoic Era comprises of Cambrian to Ordovician Periods which time span is 542-251 Ma.The Early Paleozoic Era (Cambrian–Ordovician...
الجمعة، 27 نوفمبر 2015
The Proterozoic: The Earth in Transition
Growth of Continents The Proterozoic Eon spans roughly 2 billion years, from about 2.5 Ga to the beginning of the Cambrian Period...
The Archean Eon: Birth of the Continents and Life
The Archean EonThe Archean Eon has given us where we lives now, land.Land Appears The boundary between the Archean (from the Greek...
The Hadean Eon: Before the Rock Record
Hadean EonJames Hutton, the 18th-century Scottish geologist who was the first to provide convincing evidence that the Earth was very old,...
Numerical age and geologic time
Dating Sedimentary Rocks? The mind grows giddy gazing so far back into the abyss of time. John Playfair (1747–1819), British...
الأربعاء، 25 نوفمبر 2015
How do we determine numerical age of Earth?
Numerical age determination Geologists since the days of Hutton could determine the relative ages of geologic events, but they had...
Rock stethoscope to control mining accidents
A stethoscope-like instrument will soon be deployed in mines for predicting movement of rocks during excavation and minimize the risk...
الاثنين، 23 نوفمبر 2015
Explosives - Sixth, Completely Revised Edition
Explosives - Sixth, Completely Revised Edition This world–famous work has been enlarged and updated without tampering with its tried and...
الأحد، 22 نوفمبر 2015
How do Earthquakes causes damage?
Damages from EarthquakesAn area ravaged by a major earthquake is a heartbreaking sight. The terror and sorrow etched on the faces...
Can we predict Earthquakes?
Can seismologists predict earthquakes? The answer depends on the time frame of the prediction. With our present understanding of the distribution of...
