Day 2 Pre-test Flashcards
It is defined as the pervasive planar structure that results from the nearly parallel alignment of sheet silicate minerals and/or compositional and mineralogical layering
Gneissosity
If glass is altered to secondary minerals, what takes place?
Devitrification
Which of the following is not considered as a mineral? (Anorthite, Anorthosite, Bytownite, Labradorite)
Anorthosite
The color index of an igneous rock expresses its content of:
Silica
Choose from the following list a contact metamorphic rock: (Gneiss, Schist, Phyllite, Granulite, Marble)
Marble
Structural and mineralogical changes occuring in metamorphic processes take place in an essentially what state?
Solid
Structural and mineralogical changes occuring in metamorphic processes take place in an essentially what state?
Solid
Limestone composed primarily of shell fragments are classified as:
Coquina
“Clean Sandstones” that are well-sorted and with little to no clay matrix are called:
Arenites
“Dirty” Sandstones containing
Wackes
Refers to the mass per unit volume
Density
The resistance of a mineral to breaking, crushing, or bending
Tenacity
Cavity in a rock filled with secondary minerals
Amygdule
More than 90% of the Earth’s crust is made of:
Oxygen
Which of the following is least common in the Earth’s crust? (Silicon, Oxygen, Hydrogen, Aluminum)
Hydrogen
The second most common element in the Earth’s crust is:
Silicon
Kaolinite and other clay minerals fall into which of the silicate mineral groups?
Sheet Silicates (Phyllosilicates)
Which of the following minerals is not usually produced by weathering? (Magnetite, Hematite, Limonite, Kaolinite)
Magnetite
Formation of sulfur in vents of volcanoes is an example of crystallization from?
Vapor
This refers to changes in chemical composition of rocks brought about by surficial processes:
1) Alteration
2) Supergene enrichment
3) Weathering
This refers to conduits which serve as plumbing systems during mineral deposition
1) Fractures
2) Joints
3) Faults
Name the mineral district in the northern part of Luzon Central Cordillera where the meineral Luzonite was discovered:
Mankayan Mineral District
A metal with very high melting point and is used in the exhaust of jetplanes
Nickel
A crystal system defined by the presence of e unequal axes all perpendicular to each other
Orthorhombic
______ minerals are alteration products of primary minerals
Secondary
Extreme under-cooling of magma is inferred if the igneous rock contains abundant ______
Tridymite
A crystal system where the three crystallographic axes are equal in length and intersect at right angles to each other
Isometric
In aplitic textures, almost all the mineral grains are
Subhedral
A porphyritic texture where the groundmass is glassy
Vitrophyric
Identify the textural term applicable to a rock where the quartz-feldspar intergrowth resembles cuneiform writing
Graphic
A regular, polyhedral form bounded by smooth faces and has an ordered atomic arrangement is called:
Crystal
The color of the thin surface film of material which forms as a result of exposure to the atmosphere
Tarnish
Which of the following is not a textural parameter? (Degree of Crystallinity, Density of Rock, Shape of Grains, Size of Grains)
Density of Rock
This refers to the degree of uniformity of grain size
Sorting
Which of the following minerals possesses metallic luster? (Barite, Azurite, Bornite, Garnierite)
Bornite
The following are varieties of corundum except: (Emery, Sapphire, Ruby, Emerald)
Emerald
A crystal system defined by the presence of 3 unequal axes all perpendicular to each other
Orthorhombic
What suffix signifies a metamorphic feature developed during metamorphism, unlike relict feature
Blastic
What is the parallel alignment of linear elements of the fabric of metamorphic rocks whing? the schistosity?
Schiller
The oldest intrusive in the Philippines
Lutopan Diorite
First book that gives an account on mining and minerals
De Re Metallica
Cavities formed in lavas due to expanding gases are known as:
Vesicles
A crystal system where the three crystallographic axes are equal in length at 1 point and intersect at right angles to each other:
Isometric
The following are not minerals except: (Pearl, Cubic Zirconia, Coal, Ice)
Ice
Of the following, which is not an evaporate? (Gypsum, Rock Salt, Anhydrite, Caliche, Phosphorite)
Phosphorite?
Wind deposits of largely silt and some clay are:
Loess
The color index of an igneous rock expresses its content of
Silica
A texture is called ______ if the crystals are so minute that they are not distinguishable even under the microscope.
Cryptocrystalline
A process that involves partial melting of the original rock to produce a felsic melt, which would then migrate and crystallize in pods and layers in the metamorphic rock
Migmatization
A type of sandstone with more than 50% matrix material
Greywacke
