Armoured lapilli only form in hydroclastic eruptions, where significant moisture is present.

At 4 PM, coarser sandy material and some pumice lapilli began to fall.

Typically the sagitta is used, as it is largest, but sometimes lapilli are used if they have a more convenient shape.

Accretionary lapilli form as a result of the cohesive properties of wet ash, causing the particles to bind.

When this happens, the pumice lapilli commonly flatten, and these appear on rock surfaces as dark lens shapes, known as fiamme.

Some fiamme represent fragments of volcanic ejecta, often pumice lapilli that have been flattened by compaction and/or shear.

In outcrops, lapilli tuff beds have also been identified in close association with the diamictite of the Squantum Member.

Accretionary lapilli are like volcanic hailstones that form by the addition of concentric layers of moist ash around a central nucleus.

The eruption released volcanic ash, which formed spheres of tephra known as accretionary lapilli due to the effect of electrostatic forces and moisture.

The cone is formed with slags, lapilli, sands, ashes, debris, lava boulders, slag, twisting, composite and spindle-shaped volcanic bombs.

The lapilli are believed to have been spherical originally, but were squashed into elliptical shapes as a result of intense pressure during the formation of the Caledonian Mountains.

It was called Terni Lapilli and instead of having any number of pieces, each player only had three, thus they had to move them around to empty spaces to keep playing.

About three-fifths of the more than 100 acres that made up the city has been liberated from the solidified volcanic ash and lapilli that engulfed it on that awful day.

Lapilli are spheroid, teardrop, dumbbell or button-shaped droplets of molten or semi-molten lava ejected from a volcanic eruption that fall to earth while still at least partially molten.

The "Schalsteins" of Devon and Germany include many cleaved and partly recrystallized ash-beds, some of which still retain their fragmental structure though their lapilli are flattened and drawn out.

The truck has to detour around all sorts of lesser obstacles: spatter cones, small hills of tephra, lapilli and cinders and lava bombs and other forms of ejected volcanic junk, et cetera, et cetera.

Accretionary lapilli are formed in an eruption column or cloud by moisture or electrostatic forces, with the volcanic ash nucleating on some object and then accreting to it in layers before the accretionary lapillus falls from the cloud.

Eruptions of the Upper Furnas Group were mainly characterised by alternating episodes of magmatic and phreatomagmatic activity producing deposits of inter-bedded volcanic ash and lapilli that overlie the widespread main deposits from the adjacent Fogo volcano.

This layer was a combination of lightly dense lapilli and pyroclastic deposits that originated from the small cones in the immediate vicinity of the parish, namely Pico da Urze and Pico da Boa Hora.

Commonly associated with unsieved volcanic activity-such as Plinian or krakatoan eruption styles, or phreatomagmatic eruptions-pyroclastic deposits are commonly formed from airborne ash, lapilli and bombs or blocks ejected from the volcano itself, mixed in with shattered country rock.

N. lapillus's preferences regarding other potential prey species is more confused.

Quite clearly, banding patterns in N. lapillus are inherited.

European enclaves of N. lapillus are more variable than American ones.

H. lapillus will usually spend at least a day on each prey item and in some instances the time may be nearer a week.

In Portugal and North Spain, the true open coast form of N. lapillus is not seen.

Even at much lower densities, N. lapillus must be one of the most important invertebrate predators on North Atlantic rocky shores.

At 0 C, H. lapillus is completely inactive and when the water temperature falls to this level, animals attached to steep substrata often fall off.

Astralium lapillus is a species of sea snail, a marine gastropod mollusk in the family Turbinidae, the turban snails.

The close proximity of V. lapillus's northern geographical limit to the 0 C winter isotherm (Appendix 3) suggests that ice may be the limiting factor.

Spanish and Portuguese N. lapillus tend to live under mussel clumps and in this habitat banded shells are undoubtedly cryptic.

Yet Morgan (1972) wrote that British East Coast N. lapillus refused to attack L. littorea even when starved for 4 months.

The continued use of Nucella and Thais for lapillus reflects a degree of taxonomic doubt as well as taxonomic ignorance.

Pleistocene fossils ascribed to N. lapillus are widely distributed on both sides of the Atlantic, as far south as the Canary Islands (Talavera, Kardas and Richards, 1978).

At many sheltered sites on the West Coast of Scotland, N. lapillus may be observed feeding on 5. balanoides settled on the shells of large mussels without ever attacking the bivalves at all.

N. lapillus grows for the first three years of its life (but see p. 307), and then usually marks the onset of sexual maturity by thickening the shell lip and laying down a row of white dentiform tubercles-usually known as "teeth" "-along the inside edge (Fig. 17).