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Reading, Middlesex Co., Massachusetts, USAi
Regional Level Types
Reading- not defined -
Middlesex Co.County
MassachusettsState
USACountry

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Latitude & Longitude (WGS84):
42° 31' 32'' North , 71° 5' 44'' West
Latitude & Longitude (decimal):
Nearest Settlements:
PlacePopulationDistance
Reading24,747 (2017)0.0km
Wakefield24,932 (2017)2.8km
Lynnfield11,596 (2017)4.2km
Stoneham21,437 (2017)5.1km
North Reading14,101 (2017)5.7km


The town of Reading was incorporated in 1644.

Regions containing this locality

North America PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

Mineral list contains entries from the region specified including sub-localities

7 valid minerals.

Detailed Mineral List:

Actinolite
Formula: ☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Reference: P Cristofono collection, 2007
Babingtonite
Formula: Ca2(Fe,Mn)FeSi5O14(OH)
Calcite
Formula: CaCO3
Reference: P Cristofono collection, 2007
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Reference: P Cristofono collection, 2007
Prehnite
Formula: Ca2Al2Si3O10(OH)2
Reference: Jim Cahoon collection
Quartz
Formula: SiO2
Reference: P Cristofono collection, 2007
Quartz var: Blue Quartz
Formula: SiO2
Reference: P Cristofono collection, 2007
Titanite
Formula: CaTi(SiO4)O
Reference: P Cristofono collection, 2007

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
var: Blue Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Group 9 - Silicates
Actinolite9.DE.10☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Babingtonite9.DK.05Ca2(Fe,Mn)FeSi5O14(OH)
Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Prehnite9.DP.20Ca2Al2Si3O10(OH)2
Titanite9.AG.15CaTi(SiO4)O

List of minerals arranged by Dana 8th Edition classification

Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or >[6] coordination
Titanite52.4.3.1CaTi(SiO4)O
Group 58 - SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Epidote58.2.1a.7{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=5
Babingtonite65.4.1.2Ca2(Fe,Mn)FeSi5O14(OH)
Group 72 - PHYLLOSILICATES Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings
Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings with 4-membered rings
Prehnite72.1.3.1Ca2Al2Si3O10(OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
Actinolite-☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Quartz
var: Blue Quartz
-SiO2

List of minerals for each chemical element

HHydrogen
H BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
H PrehniteCa2Al2Si3O10(OH)2
CCarbon
C CalciteCaCO3
OOxygen
O BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O QuartzSiO2
O Quartz (var: Blue Quartz)SiO2
O TitaniteCaTi(SiO4)O
O CalciteCaCO3
O Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
O PrehniteCa2Al2Si3O10(OH)2
MgMagnesium
Mg Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
AlAluminium
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Al PrehniteCa2Al2Si3O10(OH)2
SiSilicon
Si BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si QuartzSiO2
Si Quartz (var: Blue Quartz)SiO2
Si TitaniteCaTi(SiO4)O
Si Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Si PrehniteCa2Al2Si3O10(OH)2
CaCalcium
Ca BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ca TitaniteCaTi(SiO4)O
Ca CalciteCaCO3
Ca Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Ca PrehniteCa2Al2Si3O10(OH)2
TiTitanium
Ti TitaniteCaTi(SiO4)O
MnManganese
Mn BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
FeIron
Fe BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Devonian - Silurian
358.9 - 443.8 Ma



ID: 3186140
Paleozoic sedimentary and volcanic rocks

Age: Paleozoic (358.9 - 443.8 Ma)

Lithology: Mudstone-carbonate-sandstone-conglomerate

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Middle Devonian
382.7 - 393.3 Ma



ID: 2782861
Peabody Granite

Age: Middle Devonian (382.7 - 393.3 Ma)

Stratigraphic Name: Peabody Granite

Description: Alkalic granite containing ferro-hornblende. Intrudes Zgb, Zdngr.

Comments: Part of Milford-Dedham Zone (Tertiary and Older Rocks). Secondary unit description per MA007 as reported in USGS Geologic Names lexicon (ref. MA024): The Peabody Granite occurs in two plutons that total about 50 square kilometers. The large mass at Peabody (Peabody pluton) is the main body. The smaller mass near Reading (Reading pluton) is lithologically similar to the Peabody pluton. Both masses intrude the rocks of the Late Proterozoic mafic volcanic-plutonic complex. Although the major minerals and bulk composition of the Quincy, Cape Ann, and Peabody Granites are similar, their petrography, fabric, and ages of intrusion indicate distinct magmatic events. The occurrence of aplite and pegmatite in the Peabody distinguishes it from the Cape Ann Complex. Devonian age is based on Rb-Sr whole-rock age of 359 +/-24 Ma (Zartman and Marvin, 1971) and U-Pb zircon age of 395 +/-20 Ma (Zartman, 1977) (Wones and Goldsmith, 1991). Original map source: Unpublished Digital Geologic Map of Massachusetts received from Rudi Hon of Boston College in 1998; based on the 1983 USGS paper version (MA002).

Lithology: Major:{alkali granite}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

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