Tar Ball
Weathered petroleum residue
Markings and exact colorations may vary.
A dark, sticky lump of weathered oil, sometimes natural seepage, sometimes spill residue.
- Typical size
- 0.25–4 in
- How often it turns up
- Uncommon
- Collecting
- Usually legal to collect
- Handling
- May irritate skin
Do not handle bare-handed. Report large or fresh accumulations to the state; small weathered balls can be bagged with gloves.
Do not handle bare-handed; weathered oil can irritate skin and stain clothing. Report fresh or extensive deposits to local authorities.
How to tell it apart
- Black or dark brown, sticky when warm
- Sand and shell embedded in the surface
- Smells of asphalt
Found one?
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More marine debris in the field guide
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