acid rock

Acidic rock or acid rock refers to the chemical composition of igneous rocks that has 63% wt% SiO2 content. Rocks described as acidic usually contain more than 20% of free quartz. Typical acidic rocks are granite or rhyolite.

Psychedelic lyrics: Acid rock lyrics evoke drug trips. For example the words to "White Rabbit,” written by Jefferson Airplane's Grace Slick, and "Slip Inside This House" by the 13th Floor Elevators' frontman Roky Erickson both allude to the use of psychedelic drugs.

In the 1960s, the heavy, blues-influenced, psychedelic hard rock sound of bands such as the Jimi Hendrix Experience, Deep Purple, and Cream was classified as acid rock.

psychedelic rock, style of rock music popular in the late 1960s that was largely inspired by hallucinogens, or so-called “mind-expanding” drugs such as marijuana and LSD (lysergic acid diethylamide; “acid”), and that reflected drug-induced states through the use of feedback, electronics, and intense volume.

The term acid rock is generally equivalent to psychedelic rock.

An acid is any hydrogen-containing substance that is capable of donating a proton (hydrogen ion) to another substance. A base is a molecule or ion able to accept a hydrogen ion from an acid. Acidic substances are usually identified by their sour taste.

According to music critic Jim DeRogatis, writing in his book on psychedelic rock, Turn on Your Mind, the Beatles are seen as the "Acid Apostles of the New Age".

Psychedelic rock musicians also incorporated Indian instruments, like the sitar and tambura, into their sound, along with keyboard instruments like the Mellotron (an analog sampler), harpsichord, and electronic organ. 3. Improvisation: Lengthy improvised guitar solos are a focal point of many psychedelic rock songs.

When carbonic acid flows through the cracks of some rocks, it chemically reacts with the rock causing some of it to dissolve. Carbonic acid is especially reactive with calcite, which is the main mineral that makes up limestone.

Acid: rocks with above 63% silica (mostly feldspar minerals and quartz), e.g. granite. Basic: rocks that are about 45 to 55% silica (mostly mafic minerals plus plagioclase feldspar and/or feldspathoid minerals), e.g. basalt.

In February and March, two singles were released that later achieved recognition as the first psychedelic hits: the Yardbirds' "Shapes of Things" and the Byrds' "Eight Miles High".

Hydrochloric acid, nitric acid, and sulfuric acid are examples of strong acids while acetic acid, carbonic acid, and citric acid are examples of weak acids.