Thundereggs look like regular rocks from the outside, but contain intricate and colorful mineral patterns inside — often made of quartz, chalcedony, or agate. They are nodule-like rocks ...

These rocks really shouldn't be there. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The surprising discovery of volcanic, "igneous ...

The Worcester area has evidence of the Mesoproterozoic Era, going back to the earliest known days of the present-day Earth's ...

Volcanic rock is an igneous rock of volcanic origin. Volcanic rocks are usually fine-grained or aphanitic to glassy in texture. They often contain clasts of other rocks and phenocrysts.

Exotic rock fragments returned to Earth from the lunar surface by Chang'e 5 in 2020 hint at diversity in volcanic activity in the moon's distant past.

Basalt is the most common type of volcanic rock. A pāhoehoe flow is distinguished by its smooth, hummocky, or ropy surface, and is a result of gas-poor magma. When solidified and cooled, the surface ...

Melted rocks and plastics Basalt is an igneous rock originating as fiery volcanic lava. Geologists call basalt an extrusive rock, which means it’s derived from magma that bubbled up from under ...

For instance, volcanic blasts produce plumes of ash that occasionally bury organisms. Before their bodies are burned away by the torrents of magma, that are spewed onto the surface of the planet, they ...