pyroclastic

As adjectives the difference between pyroclastic and undefined

is that pyroclastic is (vulcanology) mostly composed of rock fragments of volcanic origin or comminuted during an eruption while undefined is lacking a definition or value.

As a noun pyroclastic

is a rock mostly composed of rock fragments of volcanic origin.

As an adjective pyroclastic

is (vulcanology) mostly composed of rock fragments of volcanic origin or comminuted during an eruption.

As a noun pyroclastic

is a rock mostly composed of rock fragments of volcanic origin.

As a verb lava is

to wash.

As nouns the difference between pyroclastic and lahar

is that pyroclastic is a rock mostly composed of rock fragments of volcanic origin while lahar is a volcanic mudflow.

As an adjective pyroclastic

is mostly composed of rock fragments of volcanic origin or comminuted during an eruption.

As adjectives the difference between pyroclastic and volcanoclastic

is that pyroclastic is (vulcanology) mostly composed of rock fragments of volcanic origin or comminuted during an eruption while volcanoclastic is .

As a noun pyroclastic

is a rock mostly composed of rock fragments of volcanic origin.

As adjectives the difference between tuff and pyroclastic

is that tuff is older and simplified spelling of tough while pyroclastic is (vulcanology) mostly composed of rock fragments of volcanic origin or comminuted during an eruption.

As nouns the difference between tuff and pyroclastic

is that tuff is (rock) a light porous rock, now especially a rock composed of compacted volcanic ash varying in size from fine sand to coarse gravel while pyroclastic is a rock mostly composed of rock fragments of volcanic origin.

As nouns the difference between pyroclastic and siltation

is that pyroclastic is a rock mostly composed of rock fragments of volcanic origin while siltation is the (typically undesirable) increase in concentration and or of deposition of water-borne silt in a body of water.

As an adjective pyroclastic

is (vulcanology) mostly composed of rock fragments of volcanic origin or comminuted during an eruption.

As adjectives the difference between geothermal and pyroclastic

is that geothermal is pertaining to heat energy extracted from reservoirs in the earth's interior while pyroclastic is mostly composed of rock fragments of volcanic origin or comminuted during an eruption.

As a noun pyroclastic is

a rock mostly composed of rock fragments of volcanic origin.

As nouns the difference between taxonomy and pyroclastic

is that taxonomy is the science or the technique used to make a classification while pyroclastic is a rock mostly composed of rock fragments of volcanic origin.

As an adjective pyroclastic is

mostly composed of rock fragments of volcanic origin or comminuted during an eruption.

As nouns the difference between pyroclastic and ignimbrite

is that pyroclastic is a rock mostly composed of rock fragments of volcanic origin while ignimbrite is (geology) a deposit left by the pyroclastic flow from a volcano, consisting of ash, pumice lapilli, and lithic fragments.

As an adjective pyroclastic

is (vulcanology) mostly composed of rock fragments of volcanic origin or comminuted during an eruption.