hardrock
Part of speech: noun
Morphological type: compound
Topics: business
geography
geology
mining
natural-sciences
Etymology: From hard + rock.
Compound parts: hard
rock
Inflected forms:
form: hardrocks
pos: noun
tags: plural
Senses:
gloss: Rock containing ore from which minerals are extracted.
pos: noun
tags: countable
uncountable
examples: The federal system for "hardrocks," pursuant to the Mining Law of 1872, allows the discovery, location, and development of these minerals without payment to the federal government.
Reflection coefficients calculated from impedance contrasts between felsic and mafic rocks and other common lithologies in hardrock terranes often exceed 6%, the estimated minimum value required to give strong reflections.
In this context, you asked us to provide information on (1) which types of royalties the 12 western states assess on hardrock mining operations and (2) trends on imports and exports of hardrock minerals.
gloss: Solid, nonporous rock.
pos: noun
tags: countable
uncountable
examples: The Western U.S. sample was separated into the recording site categories of hardrock ( i.e., crystalline rock outcrop) , intermediate ( i.e., sedimentary rock or thin alluvium) and alluvium ( i.e., thick alluvium), and average residuals were computed for each of the three subsets.
Its importance lies in the fact that hardrock areas cover the greater part of peninsular India. Moreover, many hardrock areas are drought-prone, making irrigation essential for reliable cropping.
Being geologically characterised by shallow topsoil layers overlying the hardrocks of the Deccan, the groundwater resources in this ecozone are localised pockets of water percolating through fissures and cracks in the hardrocks.
There are a number of hardrock boreholes in the Tahoe Basin area that were drilled for single household water supply, for snowmaking and lodge facilities ( e.g. Heavenly Valley Resort, Northstar Resort), recreational facilities (U.S. Forest Serrvice) and for use by government agencies (Caltrans, Civilian Conservation Corp). Most hardrock wells are located at high elevation, where suitable basin-fill aquifers are not available for water supply.
gloss: A type of concrete that contains relatively small amounts of aggregate relative to the amount of cement.
pos: noun
tags: countable
uncountable
examples: The tension test specimens embedded to 45 mm (1 - 3/4 inch) in hardrock concrete generally failed when the tensile limit of the anchor itself was reached.
However, the hardrock concrete at the ends of the bridge is badly cracked and deteriorated.
Unlike hardrock concrete, which is very dense, soil cement creates a “softer” floor.
gloss: An unregenerate criminal; a bully boy.
pos: noun
tags: countable
slang
uncountable
examples: Rules and regulations and strict security measures used to hold hardrocks in line work against men trying to learn responsibility for themselves.
As he looked around his eyes met those of two hardrocks, who sat on top of one of the speakers.
Eight more stretch limos and 20 other cars followed behind the hearse, and through the windows people saw Ms. Wallace, Faith Evans, and the whole Bad Boy family and waved at them. Some waved their fists in a final triumphant gesture, saluting rather than celebrating. Tears flowed from the eyes of hardrocks and babymommas. No one could feel the cold anymore.
Across the Bronx River, a small band of hardrocks at the Bronxdale Houses called the Savage Seven grew and adopted a new name, the Black Spades.
Translations: