Identification_Information: Citation: Citation_Information: Originator: U.S. Geological Survey Title: Bedrock polygons for the geologic and fracture trend map of the Pinardville quadrangle, Hillsborough County, New Hampshire Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: Open-File Report Issue_Identification: 2013-1027 Publication_Information: Publisher: U.S. Geological Survey Other_Citation_Details: Geology mapped by Thomas R. Armstrong and William C. Burton (1998). GIS database by James E. Reddy (2001-2002) with E. Allen Crider (2012). Cartography by E. Allen Crider (2012) Online_Linkage: http://pubs.usgs.gov/of/2013/1027 Description: Abstract: The Pinardville 7.5-minute quadrangle in Hillsborough County, New Hampshire encompasses a portion of the northeast-trending Massabesic anticlinorium and its northwest limb, an area of very complex geology. The core of the anticlinorium contains the Massabesic Gneiss Complex, which has metasedimentary and metavolcanic rocks at least as old as the Neoproterozoic and plutonic rocks as young as the Permian. The anticlinorium underwent high-grade metamorphism and partial melting in both the Acadian (Devonian) and Alleghanian orogenies; in the Alleghanian it was also uplifted to form the arch of the anticlinorium. The rocks of the northwest limb consist largely of metasedimentary rocks of the Silurian Rangeley Formation, which were folded and intruded by Devonian plutonic rocks during the Acadian orogeny. The Rangeley Formation rocks largely escaped the high-grade Alleghanian metamorphism and partial melting experienced by the rocks of the Massabesic anticlinorium. The rocks of the northwest limb of the anticlinorium are separated from the rocks of the core by the Campbell Hill fault zone, a largely down-to-the-northwest normal fault zone. The Campbell Hill fault zone became active during the Alleghanian uplift of the anticlinorium, producing the ductile Powder Hill fault at the contact of the northwest limb with the core of the anticlinorium, and continued into the Triassic to produce the brittle faults and bodies of vein quartz within the northwest limb. Purpose: To depict the extent of all geologic materials across the Pinardville quadrangle. This database contains information for assessing and protecting aquifers, assessing water quality, and providing a framework for evaluating hazards and finding natural resources. Supplemental_Information: The database is accompanied by a large-format color map. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: unknown Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: Unknown Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -17463700 East_Bounding_Coordinate: 2955094491792.94 North_Bounding_Coordinate: 2955063698492.94 South_Bounding_Coordinate: -48257000 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: Bedrock Geology, Folds, Faults, Structure, Neoproterozoic, Mesozoic, Paleozoic, Permian, Devonian, Silurian, Igneous Rocks, Metamorphic Rocks, Intrusive, Gneissosity, Schistosity, Fracture, Cleavage, Dikes, Bedding, Outcrops, Quartz, Pegmatite, Migmatite, Schist, Granofels, Gneiss, Paragneiss, Orthogneiss Place: Place_Keyword_Thesaurus: None Place_Keyword: Pinardville, Amherst, New Boston, Merrimack, Bedford, Goffstown, St. Anselms College, Hillsborough County, Uncanoonuc Mountains, Uncanoonuc Lake, Piscataquog River, Bowman Brook, Riddle Brook, McQuade Brook, Pulpit Brook, Baboosic Brook, Baboosic Lake Access_Constraints: Restriction Code: other restrictions; Other Constraints: Access constraints: None Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: William C. Burton Contact_Position: Geologist Contact_Address: Address_Type: Unknown Address: Eastern Geology and Paleoclimate Science Center Address: 926A National Center Address: 12201 Sunrise Valley Drive City: Reston State_or_Province: Virginia Postal_Code: 20192 Country: US Contact_Voice_Telephone: 703-648-6904 Contact_Electronic_Mail_Address: bburton@usgs.gov Data_Set_Credit: Geology mapped by Thomas R. Armstrong and William C. Burton (1998). GIS database by James E. Reddy (2001-2002) with E. Allen Crider (2012). Cartography by E. Allen Crider (2012) Security_Information: Security_Classification: Unclassified Native_Data_Set_Environment: Microsoft Windows Server 2008 R2 Version 6.1 (Build 7601) Service Pack 1; ESRI ArcGIS 10.0.0.2414 Data_Quality_Information: Lineage: Process_Step: Process_Description: Geology was mapped by William C. Burton and Thomas R. Armstrong in the summer of 1998 at a scale of 1:24,000. Point information was located precisely with the use of Rockwell PLGR+96 GPS recievers. The initial line and polygon data were compiled on a mylar greenline of the 7.5-miinute Pinardville quadrangle and scanned at 400dpi on an Anatech Eagle 4080T scanner. The resultant raster (TIFF) was converted to CAD vector files (DXF) using GTX OSR version 2.0 raster-to-vector conversion software. The vector files were imported to Arc/Info 8.0.2 as coverages. Point data were collected with GPS and hand-held 3COM Palm Pilot III PDAs. Data from the PDAs was combined with data in Microsoft Access, and then exported as ASCI text files and DBASE IV (dbf) files and into Arc/Info 8.0.2 as coverages. The Arc/Info coverages were registered and reprojected to the New Hampshire State Plane Coordinate System. Additional work performed in 2012 included importing original coverages into geodatabases in ArcGIS ArcCatalog. Line and corresponding polygon information was smoothed to remove extraneous vertices and topology was created to ensure no gaps, overlaps, pseudos, or dangles existed for bedrock polygons and contacts. Polygon, line, and point information was then attributed and ArcGIS ArcInfo was used to complete the cartography using ArcGIS representations for export into Adobe Illustrator CS5 for additional layout flexibility and "polishing" after full completion of the geospatial database and corresponding map. Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: E. Allen Crider Contact_Position: Geologist/GIS Specialist Contact_Address: Address_Type: Unknown Address: Eastern Geology and Paleoclimate Science Center Address: 926A National Center Address: 12201 Sunrise Valley Drive City: Reston State_or_Province: Virginia Postal_Code: 20192 Country: US Contact_Voice_Telephone: 703-648-6906 Contact_Electronic_Mail_Address: ecrider@usgs.gov Hours_of_Service: M-TH 10am-5pm Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains Point_and_Vector_Object_Count: 173 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Map_Projection_Name: NAD 1983 StatePlane New Hampshire FIPS 2800 Feet Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.9999666666666667 Longitude_of_Central_Meridian: -71.66666666666667 Latitude_of_Projection_Origin: 42.5 False_Easting: 984250.0 False_Northing: 0.0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.000000007286182768240225 Ordinate_Resolution: 0.000000007286182768240225 Planar_Distance_Units: Foot_US Geodetic_Model: Horizontal_Datum_Name: D North American 1983 Ellipsoid_Name: GRS 1980 Semi-major_Axis: 6378137.0 Denominator_of_Flattening_Ratio: 298.257222101 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: Bedrock Attribute: Attribute_Label: FID Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: Shape Attribute_Definition: Feature geometry. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: Shape_Area Attribute_Definition: Area of feature in internal units squared. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Positive real numbers that are automatically generated. Attribute: Attribute_Label: MapUnit Attribute_Definition: Geologic Map unit polygon designation Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Trq Enumerated_Domain_Value_Definition: Quartz (Triassic)Gray- to white-weathering, fine-grained, massive white quartz forming crosscutting veins several millimeters or centimeters thick to meters thick. Vein quartz is of multiple generations: the oldest and most heavily intruded is well-foliated muscovite-quartz rock, marking the earliest preserved states of fault movement; muscovite from this rock has yielded a 40Ar/39Ar minimum age of 239 million years (Ma) (Dorais and others, 2012). Occurs as map-scale lenses tens of meters wide and hundreds of meters long along the Campbell Hill fault zone Enumerated_Domain_Value_Definition_Source: Dorais, M.J., Wintsch, R.P., Kunk, M.J., Aleinikoff, J.N., Burton, W.C., Underdown, Christine, and Kerwin, C.M., 2012, P-T-t conditions, Nd and Pb isotopic compositions and detrital zircon geochronology of the Massabesic Gneiss Complex, New Hampshire; isotopic and metamorphic evidence for the identification of Gander basement, central New England: American Journal of Science, v. 312, no. 10, p. 10491097. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Pdg Enumerated_Domain_Value_Definition: Granite at Damon Pond (informal name) (Permian)Gray, equigranular, muscovite-biotite-potassium feldspar-plagioclase-quartz granite with centimeter- to meter-scale veins and dikes of coarse-grained, pink pegmatite with centimeter-scale phenocrysts of potassium feldspar and biotite. This unit yielded a U-Pb Thermal Ionization Mass Spectrometry (TIMS) crystallization age of 275 Ma, corresponding to the Alleghanian orogeny (Aleinikoff and others, 1979) Enumerated_Domain_Value_Definition_Source: Aleinikoff, J.N., Zartman, R.E., and Lyons, J.B., 1979, U-Th-Pb geochronology of the Massabesic Gneiss and the granite near Milford, south-central New Hampshire; new evidence for Avalonian basement and Taconic and Alleghenian disturbances in eastern New England: Contributions to Mineralogy and Petrology, v. 71, iss. 1, p. 111. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Ppg Enumerated_Domain_Value_Definition: Pegmatite and granite (Permian)White-weathering, coarse-grained biotite-potassium feldspar pegmatite and subordinate, light-gray biotite-muscovite granite (similar to granite at Damon Pond) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Dsp Enumerated_Domain_Value_Definition: Spaulding Tonalite [Pegmatite] (Early Devonian)White, coarse-grained biotite-muscovite-potassium feldspar-quartz-plagioclase pegmatite. Occurs as sills and crosscutting dikes, most commonly in tightly folded zones of schist and adjacent to contacts of granodiorite (Dsg) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Dsg Enumerated_Domain_Value_Definition: Spaulding Tonalite [Granodiorite] (Early Devonian)White to pale-tan to gray, medium-grained, massive to moderately foliated, muscovite-biotite-potassium feldspar-quartz-plagioclase granodiorite. Occurs as sills and crosscutting dikes; outcrop- and map-scale contact relationships suggest intrusion occurred after development of dominant schistosity S(n) and synkinematic with S(n+1) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Srmg Enumerated_Domain_Value_Definition: Rangeley Formation [Migmatite schist and gneiss] (Silurian)Gray, fine- to medium-grained, well-foliated biotite-muscovite-plagioclase-quartz schist and gneiss containing concordant stringers and pods of granite and pegmatite. Mostly developed in axial zones of S(n+1) folds and near contacts with granodiorite of Spaulding Tonalite (Dsg) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Sr Enumerated_Domain_Value_Definition: Rangeley Formation [Light gray biotite-muscovite schist] (Silurian)Silver to light-gray, medium-grained, well-foliated biotite-muscovite-plagioclase-quartz schist. Lacks layers of biotite schist and granofels (Srb) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Srr fine- to medium-grained, well-foliated to finely layered garnet-biotite-muscovite-plagioclase- quartz schist. Locally contains sillimanite, and tourmaline is a common accessory mineral. Locally contains layers, one to several centimeters thick, of gray granofels or quartzite, and rare coticule. Muscovite from this unit has yielded a 40Ar/39Ar plateau age of 247 Ma (Triassic), interpreted as a cooling age from Alleghanian metamorphism (Dorais and others, 2012) Enumerated_Domain_Value_Definition_Source: Dorais, M.J., Wintsch, R.P., Kunk, M.J., Aleinikoff, J.N., Burton, W.C., Underdown, Christine, and Kerwin, C.M., 2012, P-T-t conditions, Nd and Pb isotopic compositions and detrital zircon geochronology of the Massabesic Gneiss Complex, New Hampshire; isotopic and metamorphic evidence for the identification of Gander basement, central New England: American Journal of Science, v. 312, no. 10, p. 10491097. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Srb Enumerated_Domain_Value_Definition: Rangeley Formation [Biotite schist and granofels] (Silurian)Medium- to dark-gray-weathering, fine- to medium-grained, well-foliated, gray garnet-muscovite-biotite-plagioclase-quartz schist and fine-grained quartz-plagioclase granofels. Granofels occurs in multiple layers one to several centimeters thick, with schistose interbeds. Muscovite from this unit has yielded a 40Ar/39Ar plateau age of 247 Ma (Triassic), interpreted as a cooling age from Alleghanian metamorphism (Dorais and others, 2012) Enumerated_Domain_Value_Definition_Source: Dorais, M.J., Wintsch, R.P., Kunk, M.J., Aleinikoff, J.N., Burton, W.C., Underdown, Christine, and Kerwin, C.M., 2012, P-T-t conditions, Nd and Pb isotopic compositions and detrital zircon geochronology of the Massabesic Gneiss Complex, New Hampshire; isotopic and metamorphic evidence for the identification of Gander basement, central New England: American Journal of Science, v. 312, no. 10, p. 10491097. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Srq Enumerated_Domain_Value_Definition: Rangeley Formation [Rusty quartzite and schist] (Silurian)Rusty-sulfidic-weathering, fine-grained quartzite interlayered with biotite-muscovite schist. Locally contains punky-weathering pods of calc-silicate Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Srlb fine-grained, finely layered plagioclase-quartz granofels and granofelsic diopside-plagioclase-quartz calc-silicate. Lacks schistose layers of biotite schist and granofels (Srb) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: PDmg Enumerated_Domain_Value_Definition: Migmatite gneiss (Devonian-Permian)White to light-gray, equigranular, biotite-muscovite-potassium feldspar-plagioclase-quartz gneiss. Typically lacks strong foliation but contains variable amounts of distinctive plagioclase-quartz-biotite inclusions having strong foliation. Unit is a diatexite after the classification of Sawyer (2008) Enumerated_Domain_Value_Definition_Source: Sawyer, E.W., 2008, Atlas of migmatites: The Canadian Mineralogist, Special Publication 9, 371 p. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: PZmg Enumerated_Domain_Value_Definition: Layered migmatite (Permian-Neoproterozoic)Light- to dark-gray, well-layered muscovite-potassium feldspar-plagioclase-biotite-quartz gneiss, interpreted as restite with strong foliation defined by aligned biotite, interlayered with unfoliated magnetite-muscovite-quartz-plagioclase-potassium feldspar leucosome. Restite is locally hornblende bearing; hornblende from this lithology has yielded a 40Ar/39Ar total gas age of 257 Ma (Permian), interpreted as a cooling age from Alleghanian metamorphism (Dorais and others, 2012). Unit is a stromatic metatexite after the classification of Sawyer (2008) Enumerated_Domain_Value_Definition_Source: Dorais, M.J., Wintsch, R.P., Kunk, M.J., Aleinikoff, J.N., Burton, W.C., Underdown, Christine, and Kerwin, C.M., 2012, P-T-t conditions, Nd and Pb isotopic compositions and detrital zircon geochronology of the Massabesic Gneiss Complex, New Hampshire; isotopic and metamorphic evidence for the identification of Gander basement, central New England: American Journal of Science, v. 312, no. 10, p. 10491097 & Sawyer, E.W., 2008, Atlas of migmatites: The Canadian Mineralogist, Special Publication 9, 371 p. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Zmlg Enumerated_Domain_Value_Definition: Layered paragneiss and orthogneiss (Neoproterozoic)Light- to dark-gray, well-foliated and well-layered, muscovite-potassium feldspar-biotite-plagioclase-quartz gneiss. Scale of layering of orthogneiss and paragneiss ranges between several centimeters to meters. Unit is interpreted to be the unmelted host of the younger Massabesic Gneiss Complex units. Quartzite from this unit has yielded detrital zircon having a concordant U-Pb age of about 790 Ma (Neoproterozoic), interpreted as a maximum age of deposition (Dorais and others, 2012) Enumerated_Domain_Value_Definition_Source: Dorais, M.J., Wintsch, R.P., Kunk, M.J., Aleinikoff, J.N., Burton, W.C., Underdown, Christine, and Kerwin, C.M., 2012, P-T-t conditions, Nd and Pb isotopic compositions and detrital zircon geochronology of the Massabesic Gneiss Complex, New Hampshire; isotopic and metamorphic evidence for the identification of Gander basement, central New England: American Journal of Science, v. 312, no. 10, p. 10491097. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Zma Enumerated_Domain_Value_Definition: Amphibolite gneiss (Neoproterozoic)Dark-green to black, well- foliated, garnet-biotite-plagioclase-hornblende gneiss. Occurs as discontinuous zones typically 1 to 3 m thick within Zmlg and as restites in PDmg. Cores of metamorphic zircons from this lithology have yielded a Sensitive High-Resolution Ion Microprobe (SHRIMP) U-Pb Concordia age of 404±3 Ma (Early Devonian), interpreted as the age of Acadian metamorphism (Dorais and others, 2012) Enumerated_Domain_Value_Definition_Source: Dorais, M.J., Wintsch, R.P., Kunk, M.J., Aleinikoff, J.N., Burton, W.C., Underdown, Christine, and Kerwin, C.M., 2012, P-T-t conditions, Nd and Pb isotopic compositions and detrital zircon geochronology of the Massabesic Gneiss Complex, New Hampshire; isotopic and metamorphic evidence for the identification of Gander basement, central New England: American Journal of Science, v. 312, no. 10, p. 10491097. Attribute: Attribute_Label: Shape_Leng Attribute: Attribute_Label: CODE Attribute_Definition: Values in the CODE field are identical to the MapUnit field and all attributes associated with that field. Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Voice_Telephone: 1-888-ASK-USGS Hours_of_Service: 9:30am-5:30pm M-F Distribution_Liability: See access and use constraints information. Metadata_Reference_Information: Metadata_Date: 20131202 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: E. Allen Crider Contact_Position: Geologist/GIS Specialist Contact_Address: Address_Type: Unknown Address: Eastern Geology and Paleoclimate Science Center Address: 926A National Center Address: 12201 Sunrise Valley Drive City: Reston State_or_Province: Virginia Postal_Code: 20192 Country: US Contact_Voice_Telephone: 703-648-6906 Contact_Electronic_Mail_Address: ecrider@usgs.gov Hours_of_Service: M-TH 10am-5pm Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Access_Constraints: Restriction Code: other restrictions; Other Constraints: Access constraints: None Metadata_Security_Information: Metadata_Security_Classification: Unclassified