| The lava flows within the pyroclasts are composed of nephelinite and phonolite. |
| Sizes and Shapes of 10-Ma Distal Fall Pyroclasts in the Ogallala Group, Nebraska. |
| Eruption at the surface then yields initial tephrite, typically erupted as pyroclasts. |
| The coarser pyroclastic materials accumulate around the erupting volcano, but the finest pyroclasts can be found as thin layers located hundreds of kilometres from the opening. |
| He maintained this effort until the end of 1982, producing a total of 22 Pyroclasts columns. |
