Two bodies of water merging in the Gulf of Alaska. It is a result of the melting glaciers being composed of fresh water, while the ocean has a higher percentage of salt. The two bodies of water have different densities, therefore making it difficult to mix.
"Don't wish today away. Don't waste it. Redeem one hour to be grateful. Let your thanksgiving rise above the din of disappointment - opportunities lost, mistakes made, the clamor of all that has not yet come." ~Sarah Ban Breathnach