About 50 million years ago
allowing millimeter-thick layers of laminated limestone to form over time
The explosions and final impact created a smoke trail nearly 32 kilometers long that lingered for hours
Metasequoia was once widespread across the Northern Hemisphere and is well documented in the fossil record
often matching the color of the surrounding limestone matrix
1.8" Natural Polished Red Silk Banded Agate Chalcedony Mineral Specimen Zarafasaura About 50 million years agoLocation: Madagascar Weight: 1. 7 Ounces Dimensions: 1. 8 Inches Long, 1. 1 Inches Wide, 1 Inch Thick The item pictured is the one you will receive. Agate, a captivating variety of banded Chalcedony from the Quartz family, owes its name to the Achates River in Sicily, its source. With striking layers and stripes, this mineral can showcase unique "eye" patterns, colorful specks, fossilized inclusions, or even solid hues. Often called the Earths