Question: Eastlake was located just southwest of a 150 acre mine that became one of the most noted produces of what?

Context paragraphs:
Eastlake, Lake County, California: Eastlake (also, East Lake and Sulphur Bank) is a former settlement in Lake County, California.  It was located just southwest of the Sulphur Bank Mine 7 mi north-northwest of Lower Lake, at an elevation of 1355 feet (413 m).

Cornell Botanic Gardens: The Cornell Botanic Gardens, formerly known as the Cornell Plantations, is a botanical garden located adjacent to the Cornell University campus in Ithaca, New York.  The Botanic Gardens proper consist of 25 acre of botanical gardens and 150 acre of the F.R. Newman Arboretum.  The greater Botanic Gardens includes 40 different nature areas around Cornell and Ithaca, covering 4300 acre .

Mill Pond (Wareham, Massachusetts): Mill Pond, also known unofficially as Agawam Mill Pond, is a 150 acre pond in Wareham, Massachusetts.  The pond is located northwest of Union Pond, west and north of Spectacle Pond, west of Sandy Pond, and southwest of Glen Charlie Pond.  The Agawam River runs through the pond.  Route 25 runs through the southwestern part of the pond, and the Exit 2 off-ramp from Route 25 eastbound lies along the shore en route to Glen Charlie Road, which runs along the pond's eastern shore.

St. Peter's Cemetery (Lewiston, Maine): St. Peter's Cemetery (formerly the French Cemetery or Le Cimietière de la Congrégation Canadienne) is a cemetery in Lewiston, Maine.  Located on 150 acre of land, it was officially consecrated in 1876.  It is operated by the Roman Catholic Diocese of Portland.  A number of burials occurred in the cemetery prior to its official inception in 1876 and over 40,000 burials have taken place since.  In 1952, the cemetery was expanded by 24 acre with the purchase of a nearby farm.

Sulphur Bank Mine: The Sulphur Bank Mine is located near Clearlake Oaks and Clear Lake in Lake County, California.  The 150 acre mine became one of the most noted mercury producers in the world.

The Shops at La Cantera: The Shops at La Cantera is an upscale open-air regional shopping mall located in far northwest San Antonio, Texas, USA, near the Loop 1604 and Interstate 10 interchange, in the city's La Cantera District.  The initial phase of the project opened on September 16, 2005.  The 1300000 sqft center sits on a 150 acre site in La Cantera, a 1700 acre master-planned resort community being developed by USAA Real Estate Company.  La Cantera is also home to Six Flags Fiesta Texas, La Cantera Resort & Spa and two world-class golf courses, The Palmer Course at La Cantera and the Resort Course, which was home to the PGA Valero Texas Open.

Burr Oak Cemetery: Burr Oak Cemetery is a 150 acre cemetery located in Alsip, Illinois, a suburb southwest of Chicago.  As one of the few early Chicago cemeteries focused on the needs of the African-American community, it is the final resting place of many black celebrities, including Chicago blues musicians, athletes, and other notables.

Roosevelt State Park: Roosevelt State Park is a public recreation area located off Interstate 20 on the southwest side of Morton, Mississippi.  The state park surrounds 150 acre Shadow Lake at the western edge of Bienville National Forest, between Jackson and Meridian.  It is managed by the Mississippi Department of Wildlife, Fisheries and Parks.

King Farm: The King Farm is a historic farm property at King Farm Road in Woodstock, Vermont.  Encompassing more than 150 acre of woodlands and pasture, the farm has 150 years of architectural history, include a rare 18th-century English barn.  Originally a subsistence farm, it became a gentleman's farm in the late 19th century, and its farmstead now hosts a regional government commission.  The farm was listed on the National Register of Historic Places in 1997.

Pinnacle Peak (Arizona): Pinnacle Peak is a granite summit located in Scottsdale, Arizona.  The peak rises to an elevation of 3169 ft .  It is located within the 150 acre Pinnacle Peak Park, operated by the City of Scottsdale Park District.  Part of the Sonoran Desert, the park is home to a variety of native desert flora and fauna.  Hikers utilize a 1.75 mile trail to explore the area, though rock climbing skills are needed to reach the summit.

Supporting paragraphs: Eastlake, Lake County, California Sulphur Bank Mine
Answer: mercury