Tephra is fragmental material produced by a volcanic eruption regardless of composition, fragment size or emplacement mechanism. Volcanologists also refer to airborne fragments as pyroclasts. However, once clasts have fallen to the ground they remain as tephra unless hot enough to fuse together into pyroclastic rock or tuff. This particular block of tephra was photographed at Brown Bluff, Tabarin Peninsula, Antarctic Peninsula. To give an idea of scale, the height at the center of the object is at least 6 ft (1.8 m).
editor's note: In the linked wiki-article can be read that tephra fragments can be classified by size, so that our stone exactly is a Volcanic bomb.
krenek: pleasse install it back to the bottom the page, thanks!
Aug 22, 2022 17:04:07 GMT
tek: I am to completely disable it
Aug 22, 2022 16:54:37 GMT
tek: But when one scrolls down to the bottom of the page, what they see must be the true bottom of the forum page, not a chatbox.
Aug 22, 2022 16:53:39 GMT
tek: Does it not collapse when you want it to collapse?
Aug 22, 2022 16:51:34 GMT
Walter_V_R: I second that. It is annoying to have this Shoutbox floating around in the middle of the text you want to read.
Aug 22, 2022 10:28:13 GMT
krenek: can you please put it back where it was, at the bottom of the screen ...much better imho
Aug 22, 2022 7:58:08 GMT
krenek: few people use it
Aug 22, 2022 7:57:03 GMT
krenek: 1) this shoutbox is much too much intrusive
Aug 22, 2022 7:56:52 GMT
tek: This one is sizable, too. Move mouse to the left of the blue title bar, and so on...
Aug 18, 2022 17:11:28 GMT