Buenavista Petrotectonic Associations

Buenavista Petrotectonic Associations Suites of rocks that formed in response to similar geological conditions are commonly found at ______ boundaries.

Regions where partial melting of ultramafic rock results in basaltic magma are characteristic of ______ boundaries.

The most abundant volcanic rock in mid-oceanic ridges is ______.

Mid-oceanic Ridge Basalts (MORB) are divided into Normal MORB and ______ MORB based on minor and trace element abundance.

Normal MORB (N-MORB) is strongly depleted in highly incompatible elements, while Enriched MORB (E-MORB) is highly abundant in ______ elements.

Layer 4 of the oceanic crust cross-section consists of non-cumulate metamorphosed depleted mantle ______ refractory residue.

______ Andesite has 52% - 57% SiO2 in young island arc

Silicic Andesite has ____% - 63% SiO2 in mature continental arc

Phenocrysts in B.BADR DACITE include plagioclase, hornblende, pyroxene, and ____

B.BADR TRACHYANDESITE (Latite and Shoshonite) has ____% - 69% SiO2

Rhyolite has SiO2 content greater than ____%

Island Arcs magmatism along the trench results in both plutonic rocks and ____ arc rocks

_______ are the most diagnostic property Classified into: (1) Clastic, (2) Biochemical, and (3) Chemical.

_______ Sedimentary Rocks Composed of fragments (clasts) of pre-existing minerals and rocks, and classified based on Grain Sizes.

_______ Sedimentary Rocks Composed of fragments (allochems) embedded in a matrix, and classified based on the percent abundance of both.

_______ Sedimentary Rocks Composed of chemically-precipitated minerals from a mineralized fluid that had undergone evaporation, leaving a residue which later transformed into sedimentary rocks.

Metamorphic ______ Formed from the recrystallization of pre-existing rocks and minerals due to higher temperature and pressure, forming a new mineral assemblage of that specific P-T range. Classified based on Texture: Foliated or Non-foliated Classified based on Composition (dominant minerals) Excellent markers for Temperature and Pressure.

Rocks are subjected to higher P-T, and mineral components change (either compositionally or texturally). Classified based on Texture: ______ or Non-foliated Classified based on Composition (dominant minerals) Excellent markers for Temperature and Pressure.