Glaciers Carve Lakes | Icebergs Ride the Tide - South Coast Chinese Cultural Association

Published Friday, October 9, 2026

by Violet shen & Ming Chuong

Editor’s Note :

Travel is more than movement—it is a way of reading the world.

Cultural Express launches Hidden Pattern, a new column by USC professor Cheng-Ming Chuong and Violet Shen, former Director of Clinical Research at Children’s Hospital of Orange County.

Through words and images, they explore landscape, culture, nature, and science—revealing the traces of time, the path of evolution, and the hidden order of the world.

Introduction:

Glaciers never stop moving; crystal icebergs quietly melt. Follow the authors from icefields above to iceberg waters and black-sand shores, where ice and water keep carving Iceland’s living landscape. (Part II of III)

Fire below forged Iceland’s land; ice above keeps reshaping it, slow and sure.

From afar, glaciers lie like white giants between the mountains—silent, massive, timeless.

But from the air and beside drifting icebergs, we saw the truth: this frozen world is always moving, always changing.

Icefields Below, Lands Revealed

Flying from Iceland to Oslo, we crossed the glaciers of southern Iceland.

Below the window, vast ice caps spread like white plateaus, with glacier tongues reaching down mountain valleys.

Dark moraine bands traced the flow of ice—like the earth’s handwriting across its frozen surface.

From this height, the icebergs, lakes, and rivers we had encountered separately became one sweeping landscape.

Year after year, highland snow compacts under its own weight into dense ice.

Drawn by gravity, thick ice slowly flows downhill through valleys, forming outlet glaciers. Though they appear still, icefields are always moving.

As glaciers advance, the rock debris they carry scrapes and grinds the bedrock, widening and deepening valleys and leaving U-shaped valleys, moraines, and basins behind.

When glaciers retreat, meltwater takes over—carrying sediment and reshaping riverbeds. From ice cap to lake, plain, and coast, every view is part of the same changing story.

Glaciers Recede, Icebergs Rise

On Iceland’s southeast coast, Jökulsárlón Glacier Lagoon offers one of the clearest views of that transformation.

Breiðamerkurjökull, an outlet glacier of Vatnajökull, long carved out a basin.

As its front retreated, water filled the space left behind, forming today’s lagoon. Huge blocks of ice still break away and drift across its surface.

The lagoon drains to the Atlantic through a short channel.

Ice floes move toward the sea with the current and tides; some are swept back onto the nearby black-sand shore.

Clear, milky white, and blue ice glitters across the dark gravel, giving the coast its name: Diamond Beach.

From glacier to lagoon to ocean, ice completes its journey in only a short distance. Every floating iceberg marks a glacier boundary still in motion.

Blue Ice, Buried History

Bundled in heavy life jackets, we boarded a boat and entered the glacier lagoon.

As we moved among icebergs large and small, the distant scene suddenly had a startling sense of scale.

Some bergs were bright white, others deep blue, and still others streaked with black.

Up close, their cracks, hollowed shapes, and clear edges came into view. What rises above the water is only part of the ice; much more lies below.

Ice appears blue because of its density, thickness, and the distance light travels through it. Under long pressure, snow loses many of its air bubbles.

As light passes through thick ice, longer wavelengths such as red are absorbed more readily, leaving blue light to shine through.

The black bands are often volcanic ash and rock debris carried by the glacier. Even this seemingly pure ice holds the memory of Iceland’s volcanic ground.

Beneath a dark sky, the glacier lay in the distance while icebergs drifted in every shape imaginable.

We could finally feel it: glaciers never stand still. These breathtaking scenes exist in a constant state of birth, drift, and melt.

Meltwaters Split, Rivers Braid

Beyond the glacier tongues and lagoons, meltwater carries gravel, volcanic ash, and moraine debris toward the lowlands.On the flat outwash plain, the water loses some of its power to carry sediment.

Gravel settles; channels split, shift, and rejoin. From the air, the many waterways resemble silver braids woven across the dark plain—a braided river system shaped by repeated erosion and deposition.

Volcanic eruptions beneath ice, or sudden releases of trapped meltwater, can trigger glacial floods.

In a short time, these immense torrents can reroute rivers and push vast amounts of debris downstream.

Ice moves slowly, yet it can also transform a landscape in an instant.

Fire-Born Sand, Wave-Carved Stone

On Iceland’s south coast, black-sand beaches reveal the bond between ice and fire once more.

Volcanoes create dark rock. Glaciers and rivers grind it into fragments and carry it seaward; waves then sort and spread it into the black shore before us.

Though the beach faces the ocean, its story begins far inland.

Near Vík, the natural sea arch at Dyrhólaey shows the force of wave erosion. Nearby, the Reynisdrangar sea stacks rise alone from the North Atlantic.

Waves exploit cracks in the rock, gradually forming caves and arches. When an arch collapses, harder rock columns may remain as sea stacks.

The isolated pillars seen today were once part of the land.

Icelandic folklore offers another vision: two trolls dragged a ship toward shore at night but failed to reach the mountains before sunrise, turning into stone.

Geology explains how the pillars endured; legend gives the stark black coast a human memory.

Glaciers Flow, Landscapes Evolve

From the ice cap seen from above, to icebergs at water level, to the black-sand coast, the journey’s separate views finally came together.

We saw more than a single iceberg, lake, or river. We saw ice’s long passage from the highlands to the sea.

Where it flows, valleys change shape; where it retreats, lakes and rivers take over.

Fire makes the land. Ice carves its lines. Water and waves continue the work. A traveler’s fleeting view often rests on ages of change.

At the shore, ice’s journey reaches the sea—but its power to shape the land does not end.

Where meltwater meets volcanic cliffs, it rushes downward in another form. (Part II of III)

Next Week : Waterfall Thunder, Ice-Cave Wonders

Glaciers Carve Lakes | Icebergs Ride the Tide