peperite

peperite

[′pep·ə‚rīt]
(geology)
A breccialike material in marine sedimentary rock, considered to be either a mixture of lava with sediment, or shallow intrusions of magma into wet sediment.
References in periodicals archive ?
2007: Peperite formed by lava flowsover sediments: An example from the central Parana Continental Flood Basalts, Brazil.
2009: Intravent peperites related to the to the atomagmatic 71 Gulch volcano, western Snake River Plain volcanic field, Idaho (USA).
1987): Variation in peperite textures associated with differing host-sediment properties.
2002): Morphology of a crater-filling lava lake margin, The Peninsula tuff cone, Tule Lake National Wildlife Refuge, California: implications for formation of peperite textures.
These structures are considered peperites as defined by White et al.
Peperites are typically developed where magma has come into contact with unconsolidated, wet sediments (Befus et al, 2009; Kano, 1991; Kano, 2002; Kokelaar, 1982; Lavine and Aalto, 2002; Leat and Thompson, 1988; Nemeth and Martin, 2007; Walker, 1992).
2002: Pumiceous rhyolitic peperite in ancient submarine volcanic successions.
2002: Characteristics and origin of peperite involving coarse-grained host sediment.
2000: Peperites from the Limagne trench (Auvergne, French Massif Central): A distinctive facies of phreatomagmatic pyroclastics.
12 Pb-Zn deposits (New Brunswick), the presence of peperites in association with pyroclastic rocks and tufflavas indicates the in situ emplacement of pyroclastic rocks (cf.
Additionally, the development of billowed margins and peperites, the presence of fragments of structure-less sediments from the country-rocks inside the sill, the presence of vesicles and the composition of clinopyroxene indicate that the magma emplaced into wet, unconsolidated, shallow sediments (see sections 7.
The sill was emplaced at shallow levels, shortly after the deposition of the Alcotas Formation, as suggested by field and textural features (presence of billowed margins, peperites, structure-less fragments of sediments and vesicles) and by geochemical criteria (composition of the clinopyroxene crystals).