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Bureau of Mines / Minerals yearbook: Metals and minerals 1977
Year 1977, Volume 1 (1977)

Meisinger, A. C.
Pumice and volcanic cinder,   pp. 763-767 ff. PDF (521.0 KB)


Page 763

  763Pumice and Volcanic Cinder 
By A. C. Meisinger1 
 Although US. output of pumiceous mate- concrete admixtures and aggregate
continrials declined in quantity by 3% in 1977, ued as the principal end
uses and comprised value of production rose 14% to a record 84% of total
domestic consumption (exciudhigh of $12 million compared with that of ing
imports) compared with 79% in 1976. 
1976. The combined quantity from 197 oper- Average values for all end-use
categories ations in four State5 (Arizona, California, increased over those
of 1976 and the Nevada, and Oregon) was equal to 3 million weighted average
of domestic pumiceous tons, or 75% of total domestic output sold or terials
out ut was 298 r ton corn used by producers The quantity of volcanic ma P
pa 
cinder and scoria produced in 1977 was 12% pared with $2.53 per ton the previous
year. less than that in 1976, but the output of Both imports and exports
of pumice and pumice and pumicite sold or used establish- pumicite increased
significantly in tonnage ed record levels of 1.18 million tons and $4.6 and
value. Canada, Israel, and France were million, the principal export destinations,
and 
Combined use of pumiceous materials for Greece continued to be the major
source for road construction and maintenance and imported pumice and pumicite
DOMESTIC PRODUCTION 
Domestic production of pumiceous mate- the total domestic output of pumiceous
rials in 1977 totaled 4.0 million tons valued materials in 1977, the quantity
sold or used at a record $12 million (previous record high (2.8 million tons)
was under 3 million tons was $11.2 million in 1975). Compared with for the
first time since 1971. The 12% 1976 output, the quantity of pumiceous decline
in the quantity of volcanic cinder materials produced in 1977 decreased 3%
mined in 1977 was attributed primarily to a 
but the value increased 14%. 23% and 34% decrease in output from Domestic
output came from 92 individ- Arizona and Hawaii operations, respectiveuals,
firms, and governmental agencies pro- ly. Domestic output of pumice and pumicite
ducing from 253 operations in 12 States, in 1977, however, increased significantly
for compared with 93 producers and 259 oper- the second straight year (table
1) and estabations in 11 States in 1976. California led all lished record
levels in quantity (1.18 million producing States in number of active oper-
tons) and value ($4.6 million). The previous ations with 101, followed by
Oregon with 67, record highs were 1.16 million tons in 1964 and Arizona with
22. The combined output and $4.2 million in 1961. The 30% increase of pumiceous
materials from four States in domestic output of pumice and pumicite (Arizona,
California, Nevada, and Oregon) over that in 1976 (49% over that of 1975)
was nearly 3 million tons, or 75% of the mainly reflected the response of
domestic national total. Other States with significant producers to the increased
demand for output levels in 1977 were Hawaii and New pumice and pumicite
in abrasive applicaMexico. tions, building block, and construction 
Although volcanic cinder, including ace- aggregate, and the smallest quantities
of na, was produced in 10 of the 12 States and competitive grades imported
in recent in American Samoa, and comprised 71% of years. 


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