Authentic Fossil Stromatolite 2.5 Billion Year (Archaen Butterstone)
1.5 to 3 inches Comes in Box with Information
This rock is from the Greenstone Belt of southern Africa, which was formed during the Archean Period and is over 2 1/2 billion years old. The Archean Period covers 45% of the earth's history-from the beginnings of the planets (about 4 1/2 billion years ago), up to the beginning of the Proterozoic Era (2 1/2 billion years ago). During the Archean Period the surface of the earth formed, the oceans and the continents were established and life began in the shallow sea environment. There must have been seabed outcrops or lakes of considerable size, which were turbid and muddy. This residue would over time have precipitated to the bottom in layers and early algael life would have settled within these banded layers of muddy residue. Around 2.8 billion years ago the atmospheric pressure was higher and heat production around 3 times present heat production, due to increased volcanic activity. This led to the serpentinization (green color) of the sediments that had by now become hard. NOTE: YOUR PURCHASE WILL BE VERY SIMILAR TO THE PHOTOS BUT NOT AN EXACT MATCH. EACH BUTTERSTONE IS UNIQE.
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Prehistoric Planet Store
{"Manufacturer": "Prehistoric Planet Store", "Item model number": "1569", "Is Discontinued By Manufacturer": "No", "Date First Available": "September 8, 2017"}