USGS Woods Hole Coastal and Marine Geology Science Center, MA Field Activity Report for 89016

Alternate number:

LAUR89-2

Platform:

LAURENTIAN

Submersible:

Owner-Operator:

Captain:

Bob Nauda

Center Principal:

Steven Colman

Affiliate Principal
(if any):

Area of Operations:

Lake Michigan, Michigan, Wisconsin, Great Lakes, United States, North America

Bounding Coordinates

North:

44.3

South:

41.75

West:

-87.45

East:

-86.25

Start and End Dates:

June 19, 1989 to June 22, 1989

Start and End Ports:

from Grand Haven, MI to Grand Haven, MI

Days at Sea:

Project Number:

unknown

Project Title:

Lake Level and Sedimentation History (LLASH)

Cruise Funding Source:

Contract:

Type of Activity:

Seismic profiling
coring

Objectives:

Collection of seismic reflection data and cores in Lake Michigan to define the stratigraphy and sediment character of the deposits below the lake floor. The last years seismic reflection data was used to choose core locations for this cruise and to define areas where new seismic reflection data were needed. New gravity and box cores were obtained at most of the sites that were piston cored or vibracored last year, and a number of new core sites were established. These cores will be used to develop a closely dated record of sedimentation and paleoenvironmental conditions in the lake. The cores and the seismic reflection data together will be used to determine the history of lake-level fluctuations over the last several thousand years.

Information to be derived:

Grain size analysis
Morphology

Data Types (and Media) Produced:

Cores
seismic reflection profiles
navigation. Nav. coordinates recorded to disk at 10-second intervals, printed at 5-minute intervals, and recorded by hand on seismic reflection records.

Scientific Party
(USGS):

Steven Colman - Ch. Sci., David Foster, Kenneth Parolski - technician

Scientific Party
(affiliate):

Dan Block - NAGT student, Tom Davis - WHOI

Data Curator:

Scientific Equipment:

Seismic reflection (3.5 kHz): ORE transducer, ORE 140 transceiver, EPC 3200 graphic recorded
Seismic reflection (boomer): ORE Geopulse sound source and power supply, ORE Geopulse 5210A amplifier/filter, Benthos AQ-4 10-element hydrophone streamer, Datum 9300 time-code generator, BNC 7010 digital delay generator, EPC 312 record annotator, EPC 4800 graphic recorder, Panasonic AG6810 Video cassette recorder
Navigation: Megapulse Accufix 500 Loran-C receiver
WHOI: 3m vertical recovery gravity corer
Laurentian: Sutar Box Corer

Navigation techniques used:

Loran-C

Summary of Results:

Box cores: 10; Gravity cores: 8; Seismic tracklines: 14.

Number of Stations Occupied:

Station Description:

Number of Submersible Dives:

Continuous Data (in Km):

631

Seismic Line Descriptions:

Track Plot:

Related Web Sites:

Remarks:

This cruise was done in two legs: first leg June 13-18 (FA 89015); second leg June 19-22 (FA 89016). FA 89015 collected cores from Sites 1 thru 7, 9, 11 thru 13, 20, 22, and 23; FA 89016 collected cores from Sites 24 thru 31.

Contact:

Steve Colman ()

Post Field Activity Information for 89016

USGS Coastal and Marine Geology Program

Data Sites