古生物学发掘现场示意图

生成一张 4:5 竖版「古生物学发掘现场示意图」案例图，所属分类为「科研与学术图」。等距恐龙化石发掘现场图：红棕沉积物中的象牙色骨骼、两名田野工作者、地层柱与标本卡片。画面需要完整呈现上述主体、构图、配色、材质、光线和整体风格；可见文字以自然简体中文为主，必要的技术缩写、代码、变量名、学术符号、单位、拉丁物种名或装饰性外文可保留。

An isometric field-site diagram of an active fossil excavation, styled like a Natural History Museum educational exhibit graphic. The scene shows a rectangular excavation grid (4 × 6 squares, each labelled with alphanumeric grid codes A1–D6) dug 1.5 m deep into reddish-brown sedimentary matrix. In the pit, a partial theropod dinosaur skeleton is emerging from the rock: the skull visible in grid B2, rib cage in C3, femur in D4, all rendered as ivory-white bones against the red-brown rock. Two illustrated field workers in sun hats are kneeling at different grid squares using brushes and dental picks. A vertical stratigraphy column is drawn at the left edge of the pit wall, showing three sediment layers with coloured brackets and age labels: "72 Ma (Cretaceous)" in amber, "85 Ma" in tan, "95 Ma" in grey. Survey equipment — a total station on a tripod — stands at the edge. A specimen catalogue card is drawn lying on the surface, reading "Specimen #1472 — Theropoda — Femur — Grid D4". Palette: dusty terracotta, ivory, warm brown, sky blue clothing. Isometric grid perspective, no photorealism.