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sedimentary + noun
sedimentary 常作定语修饰名词，如 sedimentary rock（沉积岩）、sedimentary layer（沉积层）。
The canyon walls are made of sedimentary rock.
峡谷壁由沉积岩构成。
沉积的；沉淀的；由沉积物形成的
先理解核心含义，再看它在真实句子里的用法。
沉积的；沉淀的；由沉积物形成的
resembling or containing sediment, or formed by its accumulation
The canyon walls are made of sedimentary rock.
峡谷壁由沉积岩构成。
由细小颗粒沉积并压实而成
Made by the deposition and compression of small particles.
The canyon walls show distinct sedimentary layers that took millions of years to form.
峡谷壁呈现清晰的沉积层，这些沉积层历经数百万年才形成。
Farmers often find sedimentary soils near the river to be the most fertile.
农民通常发现河边的沉积土壤最肥沃。
The scientist identified the sample as a sedimentary rock because of its visible grain layers.
科学家根据可见的颗粒层认定该样本为沉积岩。
sedimentary 常作定语修饰名词，如 sedimentary rock（沉积岩）、sedimentary layer（沉积层）。
The canyon walls are made of sedimentary rock.
峡谷壁由沉积岩构成。
作表语时表示“由沉积形成的”，多用于地质或化学语境。
These deposits are sedimentary.
这些沉积物是沉积形成的。
Not this
The river left a lot of sedimentary on the bottom.
Use this
The river left a lot of sediment on the bottom.
sedimentary 是形容词，表示“沉积的”，不能直接作名词；表示“沉淀物”应用名词 sediment。
Not this
These are sediment rocks.
Use this
These are sedimentary rocks.
修饰名词表示“沉积的”要用形容词 sedimentary，而 sediment 是名词“沉淀物”。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
沉积岩
The canyon walls are composed of ancient sedimentary rock.
峡谷壁由古老的沉积岩构成。
沉积层
Each sedimentary layer records a different period of Earth's history.
每个沉积层记录了地球历史的不同时期。
沉积盆地
The region's oil reserves lie deep within the sedimentary basin.
该地区的石油储量位于沉积盆地深处。
沉积环境
Fossils help geologists reconstruct the ancient sedimentary environment.
化石帮助地质学家重建古代沉积环境。
沉积构造
Ripple marks are a common sedimentary structure in sandstone.
波痕是砂岩中常见的沉积构造。
沉积过程
Weathering and erosion are key steps in the sedimentary process.
风化和侵蚀是沉积过程中的关键步骤。
Use sedimentary naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
记 sediment（沉淀物）+ary；想象泥沙一层层沉到水底，变成 sedimentary（沉积的）。
语域：formal 常见场景：地质学、学术写作、沉积学 该词多用于地质学、环境科学等专业或学术语境，属于正式、科技语体；日常口语中较少出现，通常出现在教材、论文等书面材料中。
Genuine rhymes: elementary, supplementary, documentary, parliamentary and complimentary all end in /ˈmentəri/ with primary stress on the same syllable. Watch out for lookalikes that do NOT rhyme: momentary /ˈməʊməntəri/ (stress on the first syllable, weak vowel in '-men-') and sedentary /ˈsedəntəri/ (no /men/ sound).
Dictionary facts from ECDICT, WIKTIONARY.