Compact sapropel rock. Tomkeieff
A monoclinic mineral, Al2 (PO4 )(VO4 ).6H2 O .
Formerly called schoepite II. See also:schoepite; paraschoepite.
A sediment or sedimentary rock that shows evidence of having been
subjected to metamorphism. AGI
Shale altered by incipient metamorphic reconstitution but not
recrystallized and without the development of partings or preferred
mineral orientation. AGI
See:metasomatism
Pertaining to the process of metasomatism and to its results. The term is
esp. used in connection with the origin of ore deposits. AGI
The process of practically simultaneous capillary solution and deposition
by which a new mineral of partly or wholly different chemical composition
may grow in the body of an old mineral or mineral aggregate. The presence
of interstitial, chemically active pore liquids or gases contained within
a rock body or introduced from external sources is essential for the
replacement process, that often, though not necessarily, occurs at
constant volume with little disturbance of textural or structural
features. Syn:metasomosis
A rock produced by metasomatism.
a. A replacing mineral that grows in size at the expense of another
mineral (the host or palasome); a mineral grain formed by metasomatism.
AGI
b. The newly formed part of a migmatite or composite rock, introduced
during metasomatism. AGI
See:metasomatism
Monoclinic FePO4 .2H2 O , dimorphous with orthorhombic
strengite; named to correspond with metavariscite and variscite AlPO (sub
4) .2H2 O . Syn:phosphosiderite; clinostrengite.
Spencer, 4
A tetragonal mineral, Cu(UO2 )2 (PO4 )2 .8H
2 O ; meta-autunite group; strongly radioactive; emerald to apple
green; occurs in granite pegmatites. CF:torbernite
An orthorhombic mineral, Ca(UO2 )2 V2 O8 .3H
2 O ; yellow; radioactive; a secondary mineral.
A monoclinic mineral, Ba(UO2 )2 (PO4 )2 .8H
2 O ; meta-autunite group; yellow green; radioactive; a secondary
mineral in quartz veins.
A mineral, (UO2 )6 (SO4 )(OH)10 .5H2 O;
radioactive.
A tetragonal mineral, Ca(UO2 )(AsO4 )2 .8H2 O;
meta-autunite group.
A monoclinic mineral, AlPO4 .2H2 O ; green; dimorphous with
variscite.
A monoclinic mineral, FeAl2 (PO4 )2 (OH)2 .8H
2 O ; dimorphous with paravauxite; forms acicular crystals or
radiating fibrous aggregates.
The product of dehydration of vermiculite at 400 degrees C. Hey, 2
Said of partly metamorphosed volcanic rock. Stokes