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Despite being sharper, prismatic obsidian is also considerably more brittle than steel; obsidian blades of the type used on the macuahuitl tended to shatter on impact with other obsidian blades, steel swords or plate armour. Obsidian blades also have difficulty penetrating European mail. The thin, replaceable blades used on the macuahuitl were ...
Obsidian projectile point.. Obsidian is a naturally formed volcanic glass that was an important part of the material culture of Pre-Columbian Mesoamerica.Obsidian was a highly integrated part of daily and ritual life, and its widespread and varied use may be a significant contributor to Mesoamerica's lack of metallurgy.
The earliest meaning attributed to macana is a sword-like weapon made out of wood, but still sharp enough to be dangerous. [2] The term is also sometimes applied to the similar Aztec weapon, which is studded with pieces of obsidian in order to create a blade, though some authorities distinguish this item by using the Nahuatl name macuahuitl.
The obsidian mirror was a metaphor for rulership and power among the Aztecs. [76] Aztec rulers used a double-sided obsidian mirror to oversee their subjects; by gazing into one side the ruler could see how his subjects were comporting themselves and in the other side his subjects could see themselves reflected back. [7]
Knapping is the shaping of flint, chert, obsidian, or other conchoidal fracturing stone through the process of lithic reduction to manufacture stone tools, strikers for flintlock firearms, or to produce flat-faced stones for building or facing walls, and flushwork decoration.
Indian spotted creeper, Salpornis spilonotus; African spotted creeper, Salpornis salvadori; An extinct treecreeper, Certhia rummeli, was described from a fossilized right tarsometatarsus found in karstic fissure fillings in Petersbuch, Bavaria by German paleornithologist Albrecht Manegold.
The brown creeper has sometimes been considered to be a subspecies of Eurasian treecreeper, but has closer affinities to short-toed treecreeper, and is normally now treated as a full species. [2] Hodgson's treecreeper is a more recent proposed split following studies of its cytochrome b mtDNA sequence and song structure that indicate that it ...
Parthenocissus inserta (syn. Parthenocissus vitacea), also known as thicket creeper, false Virginia creeper, woodbine, or grape woodbine, is a woody vine native to North America, in southeastern Canada (west to southern Manitoba) and a large area of the United States, from Maine west to Montana and south to New Jersey and Missouri in the east, and Texas to Arizona in the west.