mock boards Flashcards
The Nagas ultramafics are predominantly serpentinites and harzburgites while the Surop ultramafics are composed mainly of serpentinized harzburgite, dunite with lherzolite and podiform chromitite exhibiting tectonic fabric. These two ultramafic bodies are associated with the:
Pujada Ophiolite
Agno Batholith, the former name of the Central Cordillera Diorite Complex, was introduced by:
Fernandez and Pulanco
Which ridge defines the eastern limit of the Shikoku Basin?
Izu-Bonin Ridge
Plutonium 239 is an artificially created radioactive isotope that has a half-life of 24,400 years. After 48,800 years, how much would be left of any sample of Plutonium 239?
¼ of the original amount
One of the earliest works presenting a comprehensive description of the Philippine Fault was by __________, who outlined its regional trace, described its sense of displacement and presented evidence on its activity.
Allen (1962)
In an oceanic – continental subduction environment, sediments and rocks debris together with the original parent materials from the subducting slabs are subjected to different temperature and pressure conditions. In a low pressure – high temperature settings, what metamorphic facies occur in this particular event with minerals zoisite and clinozoisite?
Epidote – Amphibole facies
This type of metamorphism is often closely associated with the emplacement of magma. changes induced in rocks by extremely high temperatures at low pressures. It is typically an effect noted in contact metamorphic aureoles immediately adjacent to very hot, usually basic, high-level intrusions, and in xenoliths.
Pyrometamorphism
occurs when hot, chemically active, mineral laden waters interact with a surrounding preexisting rock (called the country rock) takes place at low pressures and relatively low temperature, as the phase diagram shows.
Hydrothermal Metamorphism
The Chicxulub impact crater on the Yucatán Peninsula in Mexico is one of the largest found on Earth and is believed to be a major factor in the extinction of the dinosaurs The crater measures _______________ across.
180 km
According to PAG-ASA’s Tropical Cyclone Intensity Scale, how strong are the sustained winds of super typhoons?
> 185 km/h
an area on a fault that is stuck or locked. In the Earth, tectonic earthquakes are caused by slip along a fault plane, where two rock bodies are in rigid contact. Locked sections of faults, causing fault segmentations Fault behaving with creep motion Section of fault radiating uncommon seismic energy
asperity
Which of the following is an aulacogen of the Afar Triangle?
East African Rift
How long is the ground rupture produced by the Digdig fault during the 1990 Luzon Earthquake?
125 km
Which of the following is true regarding the trend between Calcite Compensation Depth (CCD) and Aragonite Compensation Depth (ACD)?
ACD is shallower than CCD
Physical juxtaposition of contrasting magma compositions with little or no chemical homogenization.
Magma Mingling
tiny pockets of magma that get trapped in the crystals of growing igneous rocks. Traditionally, volcano scientists study melt inclusions because they give us a snapshot of the conditions which drove explosive eruptions.
Magma Inclusion
Forms where the angle of subduction of the downgoing slab is steep and the rate of subduction is greater than the rate of plate convergence. Rifting occurs in the region of the volcanic arc where the crust is hotter and weaker.
Backarc Basin
The Minilog Formation has the index fossil _________ exposed in Palawan.
Neoschwagerina sp.
The comet that made impact on the planet Jupiter in the 1990s
Shoemaker-Levy
part of the ph stratig
antique basin
iloilo arc
ancient negros range
Dinalungan Diorite Complex is formerly known as?
Coastal Batholith
Strong, cold air masses moving down mountain slopes or off the edges of ice masses. Sounding almost like acrobatic winds, katabatic winds do bear a resemblance to tumbling, since they are essentially winds that flow downhill. Also known as fall winds, usually caused by gravity pulling higher density air downslope to lower density air
Katabatic Winds
prevailing winds from the west toward the east in the middle latitudes between 30 and 60 degrees latitude. They originate from the high-pressure areas in the horse latitudes and trend towards the poles and steer extratropical cyclones in this general manner.
Prevailing Westerlies
also called upslope wind, local air current that blows up a hill or mountain slope facing the Sun. During the day, the Sun heats such a slope (and the air over it) faster than it does the adjacent atmosphere over a valley or a plain at the same altitude.
Anabatic Winds