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Fine vugs are rimmed or occluded with clear subhedral and anhedral, often elongated, medium-crystalline (100-150 [micro]m) calcite (Fig.
3) Quartz occurs as cloudy anhedral grains with characteristic weak birefringence, prominent undulose extinction and low relief while muscovite occurs as tiny elongate plates with poikilitic crystals of quartz.
Goethite and hematite crystals cannot be distinguished and both occurred mainly as aggregates of individual anhedral platy crystals of about 5-70 nm width.
Technologies under consideration in the CH-53K, which is being developed as a new-build derivative of the CH-53E, will include a Joint Interoperable "glass" cockpit; high-efficiency rotor blades with anhedral tips; low-maintenance elastomeric rotorhead; upgraded engine system; cargo rail locking system; external cargo improvements; and survivability enhancements.
The aircraft is known as the Zond-1, which is a two to three tonne aircraft featuring an anhedral tail and a pusher propeller, and the Zond-2 and Zond-3, which are jet-powered and rather more heavy at approximately twelve tonnes.
CH-53K helicopter features include: a modern glass cockpit; fly-by-wire flight controls with active inceptors; fourth generation rotor blades with anhedral tips; a low-maintenance elastomeric rotor head; upgraded engines, each delivering in excess of 7,500 shaft horsepower; a locking cargo rail system; three external cargo hooks for improve cargo handling; improved survivability and reliability, maintainability and supportability.
The crystals of kaolinite and gibbsite associated with amorphous material are generally anhedral to rounded, which is consistent with their partial dissolution.
The five main rotor blades (a configuration that ensures a much lower vibration level) have a composite spar with parabolic blade tips boasting an anhedral profile.
The groundmass is largely intergranular with ferromagnesian microlites occupying interstices between subhedral to anhedral plagioclase laths (Fig 3a).
Pyrite crystals exhibited octahedral, pyritohedral, and equant anhedral (i.
Olivine occurs in nearly ail cumulates as sub- to anhedral grains, and is partly altered to serpentine or iddingsite.
The variably altered dyke contains subhedral to anhedral (rounded) quartz, plagioclase, and orthoclase phenocrysts (0.
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