Gelolgy of Cape Lamb, Vega Island, Antarctic Peninsula

Federal Geographic Data Committee (FGDC) Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Reference_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: MARENSSI, SERGIO ALFREDO

Publication_Date: 2001

Title: Gelolgy of Cape Lamb, Vega Island, Antarctic Peninsula

Edition:

Geospatial_Data_Presentation_Form:

Series_Information:

Series_Name:

Issue_Identification: Contribucion No. 530

Publication_Information:

Publication_Place:

Publisher: Instituto Antartico Argentino

Other_Citation_Details:

Online_Linkage:

Description:

Abstract:

The first geologic map of Cape Lamb, SW Vega Island, is presented along with their description and interpretation. The main outcrops correspond to Late Cretaceous sedimentary rocks and neogene volcanic rocks. The former, mainly sandstones and mudstones deposited in shelf environments during Maastrichtian times, are sudbivided into three informal members (K1, K2 and K3) and assigned to the Marambio Group. The identification and descrition of nine sedimentary facies allowed an environmental restoration of the area and two complete transgressive-regressive cycles (K1+K2 and K3) are identified. The erosive surface bounding these cycles is covered by a transgressive lag deposit and can be interpreted either as a wave ravinement surface (transgressive erosional surface) or as a coplanar (sequence boundary+flooding surface) surface. The Late Cretaceous rocks contain a very abundant and diverse invertebrate marine fauna and have yielded a unique assemblange of terrestrial and marine vertebrates (plesiosaurs, mosasaurs, dinosaurs and birds). A list of the vertebrates and invertebrates recognized up to now with their stratigraphic distribution is also presented. These rocks correlate with those cropping out at the northern part of the Cerro Nevado (Snow Hill) and southern part of the Marambio (Seymour) islands towards the basin center. Based on the joint occurrence of Gunnarites antarcticus and Jacobites crofti, K2 is correlated with the Karlsen Cliff and Haslum Crag members of the Snow Hill Island Formation, while palynomorphs and the amonnoid Maorites densicostatus allow to link K3 with medium levels (KLB6-7) of the Lopez de Bertodano Formation. Therefore, the lag conglomerate at the base of K3 could represent a condensed deposit equivalent to part of the Haslum Crag Member of the Snow Hill Island Formation and the lower, muddy, section (KLB1-4) of the Lopez de Bertodano Formation at the Cerro Nevado-Marambio section. The latter, assigned to the James Ross Volcanic Group, are composed of glaciomarine diamictites (Ta), intercalated within volcanic and volcaniclastic depostis and basaltic dikes (Tb). The history of the GVJRI at Cape Lamb is the result of three eruptive events. The large thickness of pyroclastic deposits indicates a clear dominance of the explosive facies. The presence of sedimentary structures and compositional studies allow to relate these deposits to subacueous and subglaciar processes. According to textural and compositioanl characteristics, the tuffs are product of base surge whereas the breccias may result from autobreccia of basalt flows entering the glaciomarine environment. Subareal facies are minor participants represented by basalt flows and subvolcanic bodies with fine columnar jointing. The geomorphology of the area is modelled mainly by glacial, marine and fluvial processes along with pervasive slumping. This paper presents and describes the distribution and composition of the different units, interpreting their origin and correlation with other parts of the James Ross Basin.

Purpose:

Not Available

Supplemental_Information:

REFERENCE: Marenssi, S.A., F.M.Salani & S.N.Marenssi. 2001. Geologia del Cabo Lamb, isla Vega, Peninsula Antartica. Contribucion Cientifica del Instituto Antartico Argentino No. 530. Buenos Aires. Argentina. pp 59

Status:

Progress: In Work

Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Description_of_Geographic_Extent:

Bounding_Coordinates:

West_Bounding_Coordinate: -57.583

East_Bounding_Coordinate: -57.583

North_Bounding_Coordinate: -63.883

South_Bounding_Coordinate: -63.883

Keywords:

Theme:

Theme_Keyword_Thesaurus: GCMD SCIENCE PARAMETERS

Theme_Keyword_Thesaurus: GCMD PLATFORM

Theme_Keyword_Thesaurus: GCMD INSTRUMENT

Theme_Keyword_Thesaurus: PROJECT

Theme_Keyword_Thesaurus: ANCILLARY KEYWORDS

Theme_Keyword_Thesaurus: ISO TOPIC CATEGORY

Theme_Keyword: EARTH SCIENCE > LAND SURFACE > EROSION/SEDIMENTATION > EROSION

Theme_Keyword: EARTH SCIENCE > LAND SURFACE > EROSION/SEDIMENTATION > SEDIMENT COMPOSITION

Theme_Keyword: EARTH SCIENCE > LAND SURFACE > EROSION/SEDIMENTATION > SEDIMENTATION

Theme_Keyword: EARTH SCIENCE > LAND SURFACE > EROSION/SEDIMENTATION > STRATIGRAPHIC SEQUENCE

Theme_Keyword: EARTH SCIENCE > PALEOCLIMATE > LAND RECORDS > MACROFOSSILS

Theme_Keyword: EARTH SCIENCE > PALEOCLIMATE > LAND RECORDS > MICROFOSSILS

Theme_Keyword: EARTH SCIENCE > PALEOCLIMATE > OCEAN/LAKE RECORDS > MACROFOSSILS

Theme_Keyword: EARTH SCIENCE > PALEOCLIMATE > OCEAN/LAKE RECORDS > MICROFOSSILS

Theme_Keyword: EARTH SCIENCE > PALEOCLIMATE > OCEAN/LAKE RECORDS > STRATIGRAPHIC SEQUENCE

Theme_Keyword: GROUND STATIONS

Theme_Keyword: VISUAL OBSERVATIONS

Theme_Keyword: CUENCAS_SEDIMENTARIAS

Theme_Keyword: Uppercretaceous

Theme_Keyword: Tertiary

Theme_Keyword: Stratigraphy

Theme_Keyword: Sedimentology

Theme_Keyword: Paleontology

Theme_Keyword: Volcanism

Theme_Keyword: Vega Island

Theme_Keyword: Cape Lamb

Theme_Keyword: CLIMATOLOGY/METEOROLOGY/ATMOSPHERE

Theme_Keyword: ENVIRONMENT

Theme_Keyword: GEOSCIENTIFIC INFORMATION

Theme_Keyword: OCEANS

Place:

Place_Keyword_Thesaurus: GCMD

Place_Keyword: CONTINENT > ANTARCTICA

Place_Keyword: GEOGRAPHIC REGION > POLAR

Place_Keyword: VERTICAL LOCATION > LAND SURFACE

Access_Constraints: Contact Sr. Sergio A. Marenssi

Use_Constraints:

Contact Sr. Sergio A. Marenssi

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: SERGIO ALFREDO MARENSSI

Contact_Position: TECHNICAL CONTACT

Contact_Address:

Address_Type: Mailing and Physical Address

Address: Centro de Datos Antarticos

Address: Direccion Nacional del Antartico

Address: Instituto Antartico Argentino

Address: Cerrito 1248

City: Capital Federal

Postal_Code: C1010AAZ

Country: Argentina

Contact_Voice_Telephone: + 54 11 4815 4064

Contact_Voice_Telephone: + 54 11 4813 7807

Contact_Facsimile_Telephone: + 54 11 4812 2086

Contact_Facsimile_Telephone: + 54 11 4813 7807

Contact_Electronic_Mail_Address: smarenssi@dna.gov.ar

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

The data have been utilized for different research projects.

Logical_Consistency_Report:

Not Available

Completeness_Report:

Not Available

Lineage:

Process_Step:

Process_Description:

Not Available

Process_Date: Unknown

Spatial_Reference_Information:

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: AR/CDA > Centro de Datos Antarticos, Argentina

Contact_Person: CELIA ELBA IZQUIERDO

Contact_Position: DATA CENTER CONTACT

Contact_Address:

Address_Type: Mailing and Physical Address

Address: Centro de Datos Antarticos

Address: Direccion Nacional del Antartico

Address: Instituto Antartico Argentino

Address: Cerrito 1248

City: Capital Federal

Postal_Code: C1010AAZ

Country: ARGENTINA

Contact_Voice_Telephone: 54-11-4812-2086

Contact_Facsimile_Telephone: 54-11-4812-2086

Contact_Electronic_Mail_Address: celeiz_antar@hotmail.com

Contact_Electronic_Mail_Address: celeiz@dna.gov.ar

Contact_Electronic_Mail_Address: cda@dna.gov.ar

Resource_Description: CDA_AR_GEO_CAPELAMB_GEOLOGICMAP

Distribution_Liability:

Not Available

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: Not Available

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://www.dna.gov.ar/

Access_Instructions:

DATA CENTER URL

Digital_Transfer_Option:

Fees: Not Available

Metadata_Reference_Information:

Metadata_Date:

Metadata_Review_Date: 20031219

Metadata_Future_Review_Date: 20031001

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: CELIA ELBA IZQUIERDO

Contact_Position: DIF AUTHOR

Contact_Address:

Address_Type: Mailing and Physical Address

Address: Centro de Datos Antarticos

Address: Direccion Nacional del Antartico

Address: Instituto Antartico Argentino

Address: Cerrito 1248

City: Capital Federal

Postal_Code: C1010AAZ

Country: ARGENTINA

Contact_Voice_Telephone: 54-11-4812-2086

Contact_Facsimile_Telephone: 54-11-4812-2086

Contact_Electronic_Mail_Address: celeiz_antar@hotmail.com

Contact_Electronic_Mail_Address: celeiz@dna.gov.ar

Contact_Electronic_Mail_Address: cda@dna.gov.ar

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time