礫岩可以在所有年齡的沉積岩石序列中找到

化學組成, 鍵及結構：(礦物)

礫岩是一種粗粒碎屑沉積岩，由大部分圓形至礫石角礫石碎屑組成，如顆粒，卵石，鵝卵石和巨石，直徑大於2毫米。礫岩通常包含細粒狀沉積物，如沙子，淤泥，粘土或它們的組合填充它們的空隙，並且通常由碳酸鈣，氧化鐵，二氧化矽或硬化粘土粘結。

Conglomerates can be found in sedimentary rock sequences of all ages

Chemical composition, bonding and structure: (Mineral)

Conglomerate is a coarse-grained clastic sedimentary rock that is composed of a substantial fraction of rounded to subangular gravel-size clasts, such as granules, pebbles, cobbles, and boulders, larger than 2 mm in diameter. Conglomerates typically contain finer grained sediment, such as sand, silt, clay or combination of them filling their interstices and are often cemented by calcium carbonate, iron oxide, silica, or hardened clay.

礫岩經常由卵石和卵石大小的沉積物沉積時開始。 填充較大的碎屑之間的空間的較細砂和粘土通常沉積在較大的碎屑之上，然後在它們之間篩選以填充間隙空間。 在壓實之後，化學水泥的沉積然後將沉積物結合到岩石中。

原生物：(化石)

Conglomerates often begin when a sediment consisting mainly of pebble- and cobble-size clasts is being deposited. The finer-size sand and clay, which fill the spaces between the larger clasts, is often deposited later on top of the large clasts and then sifts down between them to fill the interstitial spaces. After compaction, the deposition of a chemical cement then binds the sediment into a rock.

Living Specimens: (Fossil)

礫岩在許多不同的環境中形成，只要環境有足夠的運輸能量來移動大顆粒。 它形成的沉積物比其他碎屑沉積岩粗糙得多。 在礫岩中，穀粒是圓形的。

Conglomerate forms in many different environments and settings where the energy of transport is high enough to move large grains.  The sediment from which it forms is much coarser than other clastic sedimentary rocks. In conglomerates, the grains are rounded.

礫岩可以被粉碎成細小的集料，可用於低性能材料適用的地方。

Conglomerate can be crushed to make a fine aggregate that can be used where a low-performance material is suitable.

礫岩沉積在許多不同的環境中，如深水海洋，淺海洋，河流，沖積和冰川等。

Conglomerates are deposited in many different environments, such as deep water marine, shallow marine, fluvial, alluvial and glacial, etc.