A core, in marine
research, is a cylindrical section taken from sediments underlying a
water body. Core samplers range from the simple to the complex. The
variety of corer types reflect the breadth and variety of marine
research. The simplest corers are hand-operated for use in shallow
waters to collect sediment cores containing fauna. For biological
studies, a core 20-25 cm (8-10”) in length is usually sufficient. The
most complex corers are used in oceanographic research. These are
generally large and require winches, power sources and other gear.
Wildco® core sampling equipment ranges from light, hand-operated
corers used in shallow water to gravity corers relying on weight such as
the K-B™ corer. interchangeable parts serve as “building blocks” to
construct equipment for your particular project. For example, the heads
can attach to more than one type of core tube.
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| Soft to medium sediment | Hard sediments | Soft to medium sediments | Soft to medium sediments | Soft to medium sediments |
| Core Type | Hand Corer | Ogeechee™ | K-B™ Corer | Ballchek™ | Flag Sampler |
|---|---|---|---|---|---|
| Where used | Shallow salt/fresh water (to 15’) or deeper water with hand line. Usually used with handle. Fast sampling with handle | For firm or sandy bottoms in salt/fresh, swift waters (to 15’) or deepeer water with cable. Where gravity alone insufficient | Best corer as the heaviest. Good for deep lakes (100’+) where bottom interface important. “Medium” can be used in salt water. | Shallow or deep ocean water (10’ - 600’) where bottom interface not important. More stable than K-B™ | Soft sediments (silt, clay, sand, loamy, woody, decayed matter, peat), shallow water, below groundwater. |
| Accessories needed | Core catcher, liner tube, liner, nose-picce, core sample removal tool, extension handle | Nosepiece, liner, core catcher, cable, winch/mount, handle, slide (or drive) hammer | Nosepiece, liner, core catchers, cable, messanger, winch/mount, can add fin | Core tube, nosepiece, liner tube, core catcher, cable,winch/mount | Extension handle. Needs no liners. Cannot be used on line |
| Comments | Maintains core layering. “Quick and dirty”, quantitative. 19-41 lb | Use in deep water. Can drive by hand. Can pull in/out with slide hammer. Fast sampling with handle. 28-46 lb | Undisturbed samples of bottom interface. Free-drop to 30’. Messenger activated valve. 2 sizes:medium/heavy. 35 lb/56 lb | Automatic valve provides good seal. Primarily oceanographie use. 34 lb | Cutting edge twists into sediments. Uncompressed, undisturbed, full length samples. Chambered. 21 lb |
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