Provenance (geology) diagenetic changes that occur in siliciclastic sediment during burial and uplift". Provenance studies are conducted to investigate many scientific questions, for example, the growth history of continental crust, collision time of Indian and Asian plates, Asian monsoon intensity, and Himalayan exhumation Meanwhile, the provenance methods are widely used in the oil and gas industry. "Relations between provenance and basin are important for hydrocarbon exploration because sand frameworks of contrasting detrital compositions respond differently to diagenesis, and thus display different trends of porosity reduction with depth of burial." All rock exposed at the Earth's surface is subjected to physical or chemical
An Act to amend the Criminal Code (offences relating to conveyances) stays in the body, possibly for days after use, which critics believe could lead to arrests of people who aren't impaired. Jody Wilson-Raybould argued that requiring police officers to have suspicion of impairment, before screening, would serve as "inherent protection to avoid charging drivers who were not actually impaired," and that the screening methods "are consistent with the approach taken in other jurisdictions." Critics have argued that the smell of marijuana in a vehicle could lead an officer to suspect impairment, regardless of whether it has been used by the driver, therefore leading to the requirement being ineffective. Serge Joyal