Petrography rock was affixed to a microscope slide and then ground so thin that light could be transmitted through mineral grains that otherwise appeared opaque. The position of adjoining grains was not disturbed, thus permitting analysis of rock texture. Thin section petrography became the standard method of rock study. Since textural details contribute greatly to knowledge of the sequence of crystallization of the various mineral constituents in a rock, petrography progressed into petrogenesis and ultimately into petrology. It was in Europe, principally in Germany, that petrography advanced in the last half of the nineteenth century. The macroscopic characters of rocks, those
(What Is) Love? song. Lopez's vocals for the song were recorded and produced by Kuk Harrell, with recording assistance from Jim Annunziato and Josh Gudwin at Conway Studios in Hollywood, California. Annunziato and Eric Eylands handled audio engineering of "(What Is) Love?", while the song was later mixed by Mike "Handz" Donaldson at Chalice Recording Studios in Los Angeles, California. "(What Is) Love?" deals with the topic of "not knowing what love is". The song's co-writer Gordon stated that: "I felt like so many woman have that same story. No fathers, families, abusive boyfriends and husbands..no parental support, they feel alone .. I've