- From the Ancient Greek τέφρα (tephra, "ash"). (Wiktionary)
- Greek tephrā, ash; see dhegwh- in Indo-European roots. (American Heritage® Dictionary of the English Language, Fourth Edition)
“The volcano ejected a minimum of 1.1 km3 of uncompacted tephra, which is equivalent to 0. 20-0.25 km3 of magma or solid rock.”
“Fortunately, a detailed 7,000 year record is preserved in peat bogs and lake beds in the form of microscopic layers of volcanic material, including ash, called tephra.”
“In the air, after it’s blown out of the volcano, it’s pyroclast—broken rock—but on the ground it’s called tephra.”
“The type of dust that attracted the engineers to Hawaii is called "tephra," a fine, powder-like material that is ejected during a volcanic eruption.”
“As catastrophic as that would be, it was insignificant compared to the loss of life that was predicted as a result of the volcanic winter caused by the trillions of cubic meters of tephra ejected into the atmosphere.”
“Fluorine adhering to tephra of the 1970 Hekla eruption: Journal of Volcanology and Geothermal Research, v. 8, p. 251-266.”
“After tephra falls during the 1947 eruption of Hekla, fluorine contents of stream waters in areas that received between 1 to 10 cm of ash were found to be between 1.0 and 4.5 ppm for a short duration (Thorarinsson, 1979), elevated from the normal background level of 0.2 ppm.”
“The evidence from the stratified finds of Theran tephra and pumice at a number of Aegean sites supports a Late Minoan IA date.”
“Note the increased thickness about 300 km downwind; this unusual increase in tephra thickness is thought to have resulted from the sticking together of individual grains due to moisture in the eruption cloud (Sarna-Wojcicki and others, 1981).”
“The oldest levels at Kostenki underlie a volcanic ash horizon identified as the Campanian Ignimbrite Y5 tephra that is dated elsewhere to about 40,000 years ago.”
These user-created lists contain the word ‘tephra’.
A selected sampling of words for intermediate and advanced spellers.
These are just some random words that I might find a list for someday.
Hecko, words! I’m so happy I’ve found you. I want to keep you all and never want to lose you again. I hope you like it here.
I like rocks. And all the names attributed to rocks and other geologic formations. Also see the earth list.
Looking for tweets for tephra.