Stratigraphy of a middle Miocene neotropical Lagerstätte (La Venta Site, Colombia) Author Mora-Rojas, Laura Author Cárdenas, Andrés Author Jaramillo, Carlos Author Silvestro, Daniele Author Bayona, Germán Author Zapata, Sebastián Author Moreno, Federico Author Silva, César Author Moreno-Bernal, Jorge W. text Geodiversitas 2023 2023-04-13 45 6 197 221 journal article 10.5252/geodiversitas2023v45a6 1638-9395 7841790 urn:lsid:zoobank.org:pub:AD31694E-DD43-495D-BBD3-549B463AF2D3

TABLE 2. — Equivalence between the facies scheme proposed by Miall (2006) and the detailed lithofacies defined in the composite standard section. Symbol: *, modified for a comprehensive description.

	Sedimentary		Equivalence
Basic facies Facies structures			with detailed
code (sensu (sensu Miall (sensu Miall		Interpretation	lithofacies	Meaning detailed	Interpretation detailed lithofacies
Miall 2006)	2006) 2006)	(sensu Miall 2006)	(this work)	lithofacies	(this work)
Gmg	Matrix-supported Inverse to	Pseudoplastic	(c)S-Cms_iG	Conglomeratic sandstone to matrix	Flow with high transport and deposit
	gravel normal grading debris flow (low			supported conglomerate with inverse	capacity, with signs of substrate
		strength, viscous)		gradation	erosion and evidence of soil formation
					processes
Gh	Clast-supported -	Longitudinal bed	C_dBc	Conglomerate with diffuse bed	Longitudinal bed forms result of
	crudely bedded	forms		contacts which lack well-defined	secondary flows (non-cohesive),lag
	gravel			stratification	deposit
Sl-Gt	Pebbly sand to Low-angle	Scour fills,	(c)S_Cms_	Conglomeratic sandstone to matrix	Conglomeratic sand to conglomerate
	gravel, stratified (<15°) cross-	humpback or	Epsi_w-s	supported conglomerate with epsilon	bars with lateral accretion evidence
	beds - trough	washed-out dunes,		stratification and wedge-shaped
	cross-beds	antidunes and		structures
		trough cross-beds
Gp	Gravel, stratified Planar cross-	Transverse	C_Xp	Conglomerate with planar cross-	Conglomerate transverse bars
	beds	bedforms, deltaic		stratification
		growths from older
		bar remains
Sm-Gmm*	Sand, fine to Massive	Sediment-gravity	(c)S-Cms_ma_Conglomeratic sandstone to matrix		Flow with high transport and deposit
	coarse - Matrix- or faint	flow deposits -	Clens	supported conglomerate,massive and	capacity / Debris flow (viscous and with
	supported gravel* lamination-	Pseudo-plastic		conglomeratic lenses	high concentration of sediments)
	Weak grading	debris flow (high-
		strength, viscous)
St	Sand fine to very Solitary or	Sinuous-crested	(c)S_	Conglomeratic sandstone (fine to	Sand bar migration in channel floor
	coarse, may be grouped troughand linguoid (3-D)		Clens_w-s_Xt	coarse-grained),with conglomeratic
	pebbly cross-beds -	dunes - Scour fill		lenses, wedge-shaped structures and
	Broad shallow			trough cross-bedding
	scours
Sp	Sand fine to very Solitary or	Transverse and	(m)S(m)_Xp	Muddy sandstone, medium-grained	Sediment accumulation on bars of
	coarse, may be grouped planar linguoid bedforms			and cross stratification (planar)	channel floor by very low energy
	pebbly cross-beds	(2-D dunes)			currents
Sh-St*	Sand fine to Horizontal	Plane-bed flow	S(m)_Ppl_Xt_	Sand medium-grained,with planar	Sand bar / Upper flow regime -
	coarse, may be lamination	(critical flow) -	Clen_Intra	parallel lamination (at the base),	decreasing in the flow regime
	pebbly parting or	Sinuous-crested		planar cross-bedding (at the top),with
	streaming	and linguoid (3-D)		conglomeratic lenses and intraclasts
	lineation	dunes
Sp-St	Sand fine to very Solitary or	Transverse and	S(f-c)_Xpt	Sandstone (fine to coarse grain sized,	Sand bar migration in channel floor
	coarse, may be grouped planar linguoid bedforms			occasionally very coarse) with cross-
	pebbly cross-beds	(2-D dunes) -		stratification (planar or through)
		Sinuous-crested	(c)S_Xpt	Conglomeratic sandstone with cross-	Sand bar migration in channel floor
		and linguoid (3-D)		stratification (planar or trough). Both
		dunes		may have conglomeratic lenses
Sr-Fm*	Sand, very fine – Massive*	Sand with	(m)S_ma_Red-Muddy sandstone (very fine-grained),		Sediments accumulated by
	Silt, mud	dewatering or	mot_uG	massive, Red,mottled and ungraded	hyperconcentrated flows with subaerial
		bioturbation*			exposure
		– Overbank,
		abandoned channel
		or drape deposits
Sr	Sand very fine to Ripple cross-	Ripples (lower flow	S(m-c)_uCr_	Sandstone (medium to coarse grained)	Sand accumulated by flows with low
	coarse lamination	regime)	uG	with undulate current ripples and	velocities (lower flow regime) / undulate
				ungraded	currents