Oracle, Arizona
Encyclopedia
Geology
Oracle and the surrounding area sit largely on a slab of graniteGranite
Granite is a common and widely occurring type of intrusive, felsic, igneous rock. Granite usually has a medium- to coarse-grained texture. Occasionally some individual crystals are larger than the groundmass, in which case the texture is known as porphyritic. A granitic rock with a porphyritic...
called "Oracle granite" that is visible as red or grey-and-white speckled "boulders" rising over the scrub and grass. It is mostly porphyritic biotite
Biotite
Biotite is a common phyllosilicate mineral within the mica group, with the approximate chemical formula . More generally, it refers to the dark mica series, primarily a solid-solution series between the iron-endmember annite, and the magnesium-endmember phlogopite; more aluminous endmembers...
Precambrian granite with large microcline
Microcline
Microcline is an important igneous rock-forming tectosilicate mineral. It is a potassium-rich alkali feldspar. Microcline typically contains minor amounts of sodium. It is common in granite and pegmatites. Microcline forms during slow cooling of orthoclase; it is more stable at lower temperatures...
phenocrysts, and has occasional inclusions of white and milky quartz
Quartz
Quartz is the second-most-abundant mineral in the Earth's continental crust, after feldspar. It is made up of a continuous framework of SiO4 silicon–oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall formula SiO2. There are many different varieties of quartz,...
and pegmatite
Pegmatite
A pegmatite is a very crystalline, intrusive igneous rock composed of interlocking crystals usually larger than 2.5 cm in size; such rocks are referred to as pegmatitic....
. The granite rarely contains ore and veins of gold
Gold
Gold is a chemical element with the symbol Au and an atomic number of 79. Gold is a dense, soft, shiny, malleable and ductile metal. Pure gold has a bright yellow color and luster traditionally considered attractive, which it maintains without oxidizing in air or water. Chemically, gold is a...
or silver
Silver
Silver is a metallic chemical element with the chemical symbol Ag and atomic number 47. A soft, white, lustrous transition metal, it has the highest electrical conductivity of any element and the highest thermal conductivity of any metal...
, and sometimes copper
Copper
Copper is a chemical element with the symbol Cu and atomic number 29. It is a ductile metal with very high thermal and electrical conductivity. Pure copper is soft and malleable; an exposed surface has a reddish-orange tarnish...
.
Geography
Oracle is located at 32°36′58"N 110°46′55"W (32.616030, -110.781854).According to the United States Census Bureau
United States Census Bureau
The United States Census Bureau is the government agency that is responsible for the United States Census. It also gathers other national demographic and economic data...
, the CDP has a total area of 16.4 square miles (42.5 km²), all of it land.
Attractions and Events
- Biosphere 2Biosphere 2Biosphere 2 is a structure originally built to be an artificial, materially-closed ecological system in Oracle, Arizona by Space Biosphere Ventures, a joint venture whose principal officers were John P. Allen, inventor and Executive Director, and Margret Augustine, CEO...
- Oracle State ParkOracle State ParkOracle State Park is a state park of Arizona, USA, preserving in the northeastern foothills of the Santa Catalina Mountains. The park is named after the nearby town of Oracle. Oracle State Park serves as a wildlife refuge, but has been closed to public access since October 2009 due to state budget...
- GLOW, an annual nighttime multimedia art event coinciding with the full moonFull moonFull moon lunar phase that occurs when the Moon is on the opposite side of the Earth from the Sun. More precisely, a full moon occurs when the geocentric apparent longitudes of the Sun and Moon differ by 180 degrees; the Moon is then in opposition with the Sun.Lunar eclipses can only occur at...
. - Peppersauce CavePeppersauce CavePeppersauce Cave is a limestone cave found in the Santa Catalina Mountains approximately ten miles south of Oracle, Arizona. Peppersauce is frequented by about 23,000 visitors every year and contains approximately one mile of mapped passages ....
, a limestone cave with approximately one mile of mapped passages.
Demographics
As of the censusCensus
A census is the procedure of systematically acquiring and recording information about the members of a given population. It is a regularly occurring and official count of a particular population. The term is used mostly in connection with national population and housing censuses; other common...
of 2000, there were 3,563 people, 1,384 households, and 1,004 families residing in the CDP. The population density
Population density
Population density is a measurement of population per unit area or unit volume. It is frequently applied to living organisms, and particularly to humans...
was 313.0 people per square mile (120.9/km²). There were 1,534 housing units at an average density of 134.8 per square mile (52.0/km²). The racial makeup of the CDP was 77.01% White
Race (United States Census)
Race and ethnicity in the United States Census, as defined by the Federal Office of Management and Budget and the United States Census Bureau, are self-identification data items in which residents choose the race or races with which they most closely identify, and indicate whether or not they are...
, 0.14% Black
Race (United States Census)
Race and ethnicity in the United States Census, as defined by the Federal Office of Management and Budget and the United States Census Bureau, are self-identification data items in which residents choose the race or races with which they most closely identify, and indicate whether or not they are...
or African American
Race (United States Census)
Race and ethnicity in the United States Census, as defined by the Federal Office of Management and Budget and the United States Census Bureau, are self-identification data items in which residents choose the race or races with which they most closely identify, and indicate whether or not they are...
, 1.52% Native American
Race (United States Census)
Race and ethnicity in the United States Census, as defined by the Federal Office of Management and Budget and the United States Census Bureau, are self-identification data items in which residents choose the race or races with which they most closely identify, and indicate whether or not they are...
, 0.08% Asian
Race (United States Census)
Race and ethnicity in the United States Census, as defined by the Federal Office of Management and Budget and the United States Census Bureau, are self-identification data items in which residents choose the race or races with which they most closely identify, and indicate whether or not they are...
, 0.20% Pacific Islander
Race (United States Census)
Race and ethnicity in the United States Census, as defined by the Federal Office of Management and Budget and the United States Census Bureau, are self-identification data items in which residents choose the race or races with which they most closely identify, and indicate whether or not they are...
, 17.26% from other races
Race (United States Census)
Race and ethnicity in the United States Census, as defined by the Federal Office of Management and Budget and the United States Census Bureau, are self-identification data items in which residents choose the race or races with which they most closely identify, and indicate whether or not they are...
, and 3.79% from two or more races. 38.31% of the population were Hispanic
Race (United States Census)
Race and ethnicity in the United States Census, as defined by the Federal Office of Management and Budget and the United States Census Bureau, are self-identification data items in which residents choose the race or races with which they most closely identify, and indicate whether or not they are...
or Latino
Race (United States Census)
Race and ethnicity in the United States Census, as defined by the Federal Office of Management and Budget and the United States Census Bureau, are self-identification data items in which residents choose the race or races with which they most closely identify, and indicate whether or not they are...
of any race.
There were 1,384 households out of which 31.5% had children under the age of 18 living with them, 57.0% were married couples
Marriage
Marriage is a social union or legal contract between people that creates kinship. It is an institution in which interpersonal relationships, usually intimate and sexual, are acknowledged in a variety of ways, depending on the culture or subculture in which it is found...
living together, 10.4% had a female householder with no husband present, and 27.4% were non-families. 23.4% of all households were made up of individuals and 7.4% had someone living alone who was 65 years of age or older. The average household size was 2.57 and the average family size was 3.03.
In the CDP the population was spread out with 26.4% under the age of 18, 7.7% from 18 to 24, 24.6% from 25 to 44, 27.8% from 45 to 64, and 13.5% who were 65 years of age or older. The median age was 40 years. For every 100 females there were 97.5 males. For every 100 females age 18 and over, there were 95.8 males.
The median income for a household in the CDP was $38,267, and the median income for a family was $46,026. Males had a median income of $37,667 versus $30,667 for females. The per capita income
Per capita income
Per capita income or income per person is a measure of mean income within an economic aggregate, such as a country or city. It is calculated by taking a measure of all sources of income in the aggregate and dividing it by the total population...
for the CDP was $19,459. About 8.0% of families and 10.0% of the population were below the poverty line, including 10.8% of those under age 18 and 3.2% of those age 65 or over.